Q001. A 4 ft pry bar is used as a first-class lever. The fulcrum is 1 ft from the load. If you push down on the opposite end, what is the mechanical advantage (ideal, ignoring friction)?

Q002. A hydraulic jack has an input piston area of 2 cm² and an output piston area of 50 cm². If the input force is 120 N, what ideal output force is produced?

Q003. Two identical gears mesh. Gear A rotates clockwise at 60 rpm. Gear B rotates:

Q004. A block is pulled at constant speed across a level floor with a horizontal force of 40 lb. What does that imply about the kinetic friction force on the block?

Q005. A rope passes over a frictionless fixed pulley to lift a 200 lb load. What ideal effort force is required to lift it steadily?

Q006. A 10 lb object is at rest on a 30° incline. Ignoring friction, what component of the object’s weight acts parallel to the incline pulling it downhill?

Q007. A steel rod and an aluminum rod have the same length at room temperature. When heated equally, which statement is most accurate?

Q008. A 6 kg box is accelerated at 2 m/s² on a frictionless surface. What net force is required?

Q009. A wheel and axle has a wheel radius of 12 inches and an axle radius of 3 inches. What is the ideal mechanical advantage?

Q010. A liquid is flowing through a pipe that narrows to half the original diameter. If the flow is steady and the liquid is incompressible, what happens to the fluid speed in the narrow section?

Q011. A bolt is tightened with a wrench. Which is most directly increased by using a longer wrench handle with the same applied force?

Q012. A car’s brakes convert kinetic energy mostly into:

Q013. A 20 lb load is lifted with a single movable pulley (ideal, frictionless). What effort force is required to lift the load steadily?

Q014. Two springs are connected in parallel. Compared with one spring, the combined spring constant is:

Q015. A 1,500 lb car rests on four identical tires. If the weight is evenly distributed, approximately how much normal force acts on each tire?

Q016. A metal object floats in mercury but sinks in water. Which statement best explains this?

Q017. A fan blade spinning faster does work on the air mainly by increasing the air’s:

Q018. A beam is supported at both ends and a load is placed exactly in the center. In an ideal symmetric case, the reactions at the supports are:

Q019. A 12 V battery supplies 3 A to a resistive load. What is the resistance of the load?

Q020. In an internal combustion engine, which stroke compresses the air-fuel mixture?

Q021. A machine uses 500 J of input energy to lift a load, but only 400 J becomes useful output. What is the efficiency?

Q022. A car rounds a curve of fixed radius at a higher speed. What happens to the required centripetal force?

Q023. A heat engine is redesigned so less heat is lost to the surroundings. All else equal, what happens to its efficiency?

Q024. A pulley system has an ideal mechanical advantage of 4. If the load is 240 lb, what ideal effort is needed to lift it steadily?

Q025. Two different metals are connected end-to-end and heated at one end (a bimetal strip). If one metal expands more than the other, the strip will:

Q026. A 300 lb load is lifted by an ideal system with a mechanical advantage of 6. About how much input force is needed to lift it steadily?

Q027. A ramp raises a crate 3 ft using a ramp length of 12 ft (ignore friction). What is the ideal mechanical advantage of the ramp?

Q028. Two gears mesh: Gear A has 12 teeth and drives Gear B with 36 teeth. If Gear A turns at 90 rpm, Gear B turns at:

Q029. A wrench applies 25 lb of force perpendicular to a bolt at a distance of 8 inches from the center. What torque is applied (in lb·in)?

Q030. A 5 kg object moving at 4 m/s is brought to rest. How much kinetic energy is removed?

Q031. A motor does 900 J of work in 3 seconds. What is the power output?

Q032. In an ideal hydraulic system, the input piston area is 4 in² and the output piston area is 32 in². If input force is 40 lb, output force is:

Q033. A 2.0 kg object has a volume of 1.0 liter. Will it float in water (1.0 kg/L)?

Q034. A uniform 10 ft beam weighs 40 lb and is supported at one end like a cantilever. Where does the beam’s weight act for torque calculations?

Q035. A 100 lb crate requires 30 lb of horizontal force to slide at constant speed on a level floor. The kinetic friction force is:

Q036. Two identical springs each have k = 200 N/m and are connected in series. The equivalent spring constant is:

Q037. A device draws 2.5 A from a 12 V source. The electrical power used is:

Q038. Two rods of equal length and cross-section are used as heat conductors, one copper and one wood. Which transfers heat faster?

Q039. Water pressure at a certain depth depends most directly on:

Q040. A block-and-tackle has 4 supporting rope segments holding the load (ideal). If you pull 8 ft of rope, the load rises:

Q041. A wheel-and-axle has a wheel radius of 10 cm and axle radius of 2 cm. Ideal mechanical advantage is:

Q042. A spring with k = 300 N/m is stretched 0.20 m. The spring force is:

Q043. A fluid’s speed increases as it flows through a narrower section of pipe. In general, the static pressure in that narrow section tends to:

Q044. Why do ball bearings reduce friction in rotating shafts?

Q045. A 12 ft plank is used as a lever with the fulcrum 3 ft from the load end. Effort is applied at the far end. Ideal mechanical advantage is:

Q046. A machine has an ideal mechanical advantage of 10 but an actual mechanical advantage of 8. The efficiency is:

Q047. A 60 N force pushes a box 5 m in the direction of motion. How much work is done?

Q048. A screw has a pitch of 0.25 in per turn. If you turn it 8 turns, it advances about:

Q049. A third-class lever is best described as one where the effort is located:

Q050. A 2 m long wrench is used with a 100 N force applied at a 30° angle to the wrench (relative to the handle). What is the torque magnitude?

Q051. A chain drive uses a 10-tooth front sprocket driving a 30-tooth rear sprocket. If the front rotates at 120 rpm, the rear rotates at about:

Q052. If a car’s speed doubles, the stopping distance from braking (all else equal) tends to:

Q053. A 200 lb crate is pushed up a frictionless ramp 10 ft long to a height of 2 ft. The ideal input force along the ramp is:

Q054. Which mode of heat transfer requires bulk movement of a fluid?

Q055. Expansion joints are used in bridges primarily to:

Q056. A fluid in a container exerts pressure on the bottom because of:

Q057. A pulley arrangement supports a load with 3 rope segments (ideal). A 150 lb load would require about what effort to lift steadily?

Q058. A 30 lb force is applied to a 1.5 ft long screwdriver handle used as a wheel-and-axle with an axle radius of 0.25 in. Which best describes the effect?

Q059. A wedge is essentially two inclined planes back-to-back. Increasing wedge length while keeping thickness the same will generally:

Q060. A 2,000 N load is lifted by a jack with efficiency 70%. If the ideal required input is 200 N, the actual input is closest to:

Q061. Two identical resistors are connected in parallel. Compared with one resistor, the equivalent resistance is:

Q062. A 6 Ω and a 3 Ω resistor are in series across 18 V. The current is:

Q063. A flywheel is added to a machine. Its main benefit is that it:

Q064. A 20 N force is applied at the end of a 0.5 m lever, but only 60% of the force is perpendicular. The torque is:

Q065. A solid disk and a solid ring of equal mass and radius roll down the same incline without slipping. Which reaches the bottom first?

Q066. A 400 lb load is supported by a hydraulic lift with output piston area 20 in². What is the fluid pressure (psi) in the system (ideal)?

Q067. A 600 lb load rests on a base plate area of 30 in². The pressure on the surface is about:

Q068. A motor delivers 746 W of power. This is approximately:

Q069. An idler gear is inserted between two meshing gears. Compared to a direct mesh, the idler gear causes the driven gear to rotate:

Q070. A wheel has radius 0.30 m and rotates at 10 rad/s. The linear speed at the rim is:

Q071. A 2,000 N force acts for 0.05 s on an object. The impulse delivered is:

Q072. A steel cable is loaded in tension. “Yield strength” refers to the stress at which the cable:

Q073. In bending a beam, the “neutral axis” is the region where the material experiences:

Q074. A 10 lb object displaces 0.12 ft³ of water (62.4 lb/ft³). The buoyant force is closest to:

Q075. A fluid is pushed through a pipe that narrows so cross-sectional area is reduced to one-half. For steady incompressible flow, speed in the narrow section becomes:

Q076. A refrigerator removes heat from its interior primarily by causing a fluid to:

Q077. A block-and-tackle has 5 supporting rope segments (ideal). A 250 lb load requires about what effort?

Q078. A 120 lb crate is on a ramp at 20° with coefficient of kinetic friction 0.20. Which is closest to the friction force while sliding?

Q079. A 10 kg cart is pulled with 30 N on a level surface. If friction is 10 N, the acceleration is:

Q080. A car moves around a curve of radius r. If speed triples, the required centripetal acceleration becomes:

Q081. A 2 kg object slides down a frictionless 5 m high hill. Its speed at the bottom is closest to:

Q082. A bolt requires 60 lb·ft of torque to loosen. Using a 2 ft wrench, the minimum perpendicular force needed is:

Q083. A bicycle uses a 48-tooth chainring driving a 16-tooth rear cog. If the rider turns pedals at 60 rpm, the rear wheel sprocket rotates at:

Q084. A hydraulic lift has input area 3 in² and output area 24 in². If the input piston moves 8 inches, the output piston moves (ideal):

Q085. A 50 lb box is lifted vertically 6 ft. The increase in gravitational potential energy is:

Q086. A 1,000 kg car moving 15 m/s is stopped by brakes doing work. The work done by brakes is closest to:

Q087. A spring is compressed 0.10 m and stores 12 J of energy. The spring constant k is closest to:

Q088. A beam is in static equilibrium. Which condition must be true in addition to net force being zero?

Q089. A 1,600 lb vehicle weight is evenly distributed on four tires. If each tire’s contact patch is 20 in², the average pressure under each tire is about:

Q090. Which loading type tends to cause layers of material to slide past each other?

Q091. A first-class lever has the fulcrum between effort and load. If the fulcrum is moved closer to the load, the lever’s mechanical advantage:

Q092. An ideal pulley system has a mechanical advantage of 8. If you want to lift a load 3 ft, you must pull approximately:

Q093. A machine outputs 520 J of useful work with 65% efficiency. The required input energy is closest to:

Q094. A screw jack has a handle radius of 10 inches and a screw pitch of 0.25 inch per turn (ideal). Its ideal mechanical advantage is closest to:

Q095. A block-and-tackle lifts a load 2 ft while you pull 16 ft of rope (ideal). The mechanical advantage is:

Q096. Three gears are in a line: A meshes with B, and B meshes with C. If A rotates clockwise, C rotates:

Q097. A single movable pulley attached to a load is combined with a fixed pulley above it (ideal). The primary benefit of the fixed pulley is to:

Q098. A copper rod and a stainless-steel rod have the same dimensions. Which will generally conduct heat faster?

Q099. A 200 lb crate on a level floor does not move until the horizontal pull reaches 70 lb. This 70 lb represents the:

Q100. An ideal hydraulic press has input area 2 cm² and output area 50 cm². If the output piston rises 1 cm, the input piston must move about:

Q101. A 8 kg toolbox is lifted vertically 3 m at constant speed. Approximately how much work is done against gravity?

Q102. A 9 kg toolbox is lifted vertically 4 m at constant speed. Approximately how much work is done against gravity?

Q103. A 10 kg toolbox is lifted vertically 5 m at constant speed. Approximately how much work is done against gravity?

Q104. A 11 kg toolbox is lifted vertically 3 m at constant speed. Approximately how much work is done against gravity?

Q105. A 12 kg toolbox is lifted vertically 4 m at constant speed. Approximately how much work is done against gravity?

Q106. A 13 kg toolbox is lifted vertically 5 m at constant speed. Approximately how much work is done against gravity?

Q107. A 14 kg toolbox is lifted vertically 3 m at constant speed. Approximately how much work is done against gravity?

Q108. A 15 kg toolbox is lifted vertically 4 m at constant speed. Approximately how much work is done against gravity?

Q109. A 16 kg toolbox is lifted vertically 5 m at constant speed. Approximately how much work is done against gravity?

Q110. A 17 kg toolbox is lifted vertically 3 m at constant speed. Approximately how much work is done against gravity?

Q111. A pry bar acts as a first-class lever. The effort arm is 18 in and the load arm is 3 in. What is the ideal mechanical advantage?

Q112. A pry bar acts as a first-class lever. The effort arm is 17 in and the load arm is 4 in. What is the ideal mechanical advantage?

Q113. A pry bar acts as a first-class lever. The effort arm is 16 in and the load arm is 5 in. What is the ideal mechanical advantage?

Q114. A pry bar acts as a first-class lever. The effort arm is 15 in and the load arm is 6 in. What is the ideal mechanical advantage?

Q115. A pry bar acts as a first-class lever. The effort arm is 14 in and the load arm is 3 in. What is the ideal mechanical advantage?

Q116. A pry bar acts as a first-class lever. The effort arm is 13 in and the load arm is 4 in. What is the ideal mechanical advantage?

Q117. A pry bar acts as a first-class lever. The effort arm is 12 in and the load arm is 5 in. What is the ideal mechanical advantage?

Q118. A pry bar acts as a first-class lever. The effort arm is 11 in and the load arm is 6 in. What is the ideal mechanical advantage?

Q119. A pry bar acts as a first-class lever. The effort arm is 10 in and the load arm is 3 in. What is the ideal mechanical advantage?

Q120. A pry bar acts as a first-class lever. The effort arm is 9 in and the load arm is 4 in. What is the ideal mechanical advantage?

Q121. An ideal block-and-tackle supports a 120 lb load with 2 rope segments. About what steady effort force is required?

Q122. An ideal block-and-tackle supports a 130 lb load with 3 rope segments. About what steady effort force is required?

Q123. An ideal block-and-tackle supports a 140 lb load with 4 rope segments. About what steady effort force is required?

Q124. An ideal block-and-tackle supports a 150 lb load with 5 rope segments. About what steady effort force is required?

Q125. An ideal block-and-tackle supports a 160 lb load with 6 rope segments. About what steady effort force is required?

Q126. An ideal block-and-tackle supports a 170 lb load with 2 rope segments. About what steady effort force is required?

Q127. An ideal block-and-tackle supports a 180 lb load with 3 rope segments. About what steady effort force is required?

Q128. An ideal block-and-tackle supports a 190 lb load with 4 rope segments. About what steady effort force is required?

Q129. An ideal block-and-tackle supports a 200 lb load with 5 rope segments. About what steady effort force is required?

Q130. An ideal block-and-tackle supports a 210 lb load with 6 rope segments. About what steady effort force is required?

Q131. In an ideal hydraulic press, the input piston area is 2 cm² and the output piston area is 20 cm². If the input force is 80 N, the output force is closest to:

Q132. In an ideal hydraulic press, the input piston area is 3 cm² and the output piston area is 25 cm². If the input force is 90 N, the output force is closest to:

Q133. In an ideal hydraulic press, the input piston area is 4 cm² and the output piston area is 30 cm². If the input force is 100 N, the output force is closest to:

Q134. In an ideal hydraulic press, the input piston area is 5 cm² and the output piston area is 35 cm². If the input force is 80 N, the output force is closest to:

Q135. In an ideal hydraulic press, the input piston area is 2 cm² and the output piston area is 40 cm². If the input force is 90 N, the output force is closest to:

Q136. In an ideal hydraulic press, the input piston area is 3 cm² and the output piston area is 45 cm². If the input force is 100 N, the output force is closest to:

Q137. In an ideal hydraulic press, the input piston area is 4 cm² and the output piston area is 50 cm². If the input force is 80 N, the output force is closest to:

Q138. In an ideal hydraulic press, the input piston area is 5 cm² and the output piston area is 55 cm². If the input force is 90 N, the output force is closest to:

Q139. In an ideal hydraulic press, the input piston area is 2 cm² and the output piston area is 60 cm². If the input force is 100 N, the output force is closest to:

Q140. In an ideal hydraulic press, the input piston area is 3 cm² and the output piston area is 65 cm². If the input force is 80 N, the output force is closest to:

Q141. A 150 lb crate slides on a ramp at 15° with coefficient of kinetic friction 0.15. Approximately how large is the friction force while sliding?

Q142. A 155 lb crate slides on a ramp at 20° with coefficient of kinetic friction 0.16. Approximately how large is the friction force while sliding?

Q143. A 160 lb crate slides on a ramp at 25° with coefficient of kinetic friction 0.17. Approximately how large is the friction force while sliding?

Q144. A 165 lb crate slides on a ramp at 30° with coefficient of kinetic friction 0.18. Approximately how large is the friction force while sliding?

Q145. A 170 lb crate slides on a ramp at 35° with coefficient of kinetic friction 0.19. Approximately how large is the friction force while sliding?

Q146. A 175 lb crate slides on a ramp at 40° with coefficient of kinetic friction 0.15. Approximately how large is the friction force while sliding?

Q147. A 180 lb crate slides on a ramp at 15° with coefficient of kinetic friction 0.16. Approximately how large is the friction force while sliding?

Q148. A 185 lb crate slides on a ramp at 20° with coefficient of kinetic friction 0.17. Approximately how large is the friction force while sliding?

Q149. A 190 lb crate slides on a ramp at 25° with coefficient of kinetic friction 0.18. Approximately how large is the friction force while sliding?

Q150. A 195 lb crate slides on a ramp at 30° with coefficient of kinetic friction 0.19. Approximately how large is the friction force while sliding?

Q151. A gear with 12 teeth drives a gear with 36 teeth. If the driving gear turns at 60 rpm, the driven gear turns at about:

Q152. A gear with 16 teeth drives a gear with 38 teeth. If the driving gear turns at 70 rpm, the driven gear turns at about:

Q153. A gear with 20 teeth drives a gear with 40 teeth. If the driving gear turns at 80 rpm, the driven gear turns at about:

Q154. A gear with 24 teeth drives a gear with 42 teeth. If the driving gear turns at 90 rpm, the driven gear turns at about:

Q155. A gear with 28 teeth drives a gear with 44 teeth. If the driving gear turns at 100 rpm, the driven gear turns at about:

Q156. A gear with 12 teeth drives a gear with 46 teeth. If the driving gear turns at 110 rpm, the driven gear turns at about:

Q157. A gear with 16 teeth drives a gear with 48 teeth. If the driving gear turns at 120 rpm, the driven gear turns at about:

Q158. A gear with 20 teeth drives a gear with 50 teeth. If the driving gear turns at 130 rpm, the driven gear turns at about:

Q159. A gear with 24 teeth drives a gear with 52 teeth. If the driving gear turns at 140 rpm, the driven gear turns at about:

Q160. A gear with 28 teeth drives a gear with 54 teeth. If the driving gear turns at 150 rpm, the driven gear turns at about:

Q161. A force of 120 N is applied at the end of a 0.4 m wrench at an angle of 20° to the wrench handle. What is the torque magnitude (approximately)?

Q162. A force of 135 N is applied at the end of a 0.5 m wrench at an angle of 30° to the wrench handle. What is the torque magnitude (approximately)?

Q163. A force of 150 N is applied at the end of a 0.6 m wrench at an angle of 40° to the wrench handle. What is the torque magnitude (approximately)?

Q164. A force of 165 N is applied at the end of a 0.7 m wrench at an angle of 50° to the wrench handle. What is the torque magnitude (approximately)?

Q165. A force of 180 N is applied at the end of a 0.4 m wrench at an angle of 60° to the wrench handle. What is the torque magnitude (approximately)?

Q166. A force of 195 N is applied at the end of a 0.5 m wrench at an angle of 20° to the wrench handle. What is the torque magnitude (approximately)?

Q167. A force of 210 N is applied at the end of a 0.6 m wrench at an angle of 30° to the wrench handle. What is the torque magnitude (approximately)?

Q168. A force of 225 N is applied at the end of a 0.7 m wrench at an angle of 40° to the wrench handle. What is the torque magnitude (approximately)?

Q169. A force of 240 N is applied at the end of a 0.4 m wrench at an angle of 50° to the wrench handle. What is the torque magnitude (approximately)?

Q170. A force of 255 N is applied at the end of a 0.5 m wrench at an angle of 60° to the wrench handle. What is the torque magnitude (approximately)?

Q171. A 900 kg vehicle travels at 10 m/s around a curve of radius 40 m. What centripetal force is required (approximately)?

Q172. A 950 kg vehicle travels at 11 m/s around a curve of radius 45 m. What centripetal force is required (approximately)?

Q173. A 1000 kg vehicle travels at 12 m/s around a curve of radius 50 m. What centripetal force is required (approximately)?

Q174. A 1050 kg vehicle travels at 13 m/s around a curve of radius 55 m. What centripetal force is required (approximately)?

Q175. A 1100 kg vehicle travels at 14 m/s around a curve of radius 40 m. What centripetal force is required (approximately)?

Q176. A 1150 kg vehicle travels at 15 m/s around a curve of radius 45 m. What centripetal force is required (approximately)?

Q177. A 1200 kg vehicle travels at 16 m/s around a curve of radius 50 m. What centripetal force is required (approximately)?

Q178. A 1250 kg vehicle travels at 17 m/s around a curve of radius 55 m. What centripetal force is required (approximately)?

Q179. A 1300 kg vehicle travels at 18 m/s around a curve of radius 40 m. What centripetal force is required (approximately)?

Q180. A 1350 kg vehicle travels at 19 m/s around a curve of radius 45 m. What centripetal force is required (approximately)?

Q181. A steel pin carries a tensile load of 4000 N. Its cross-sectional area is 50 mm². The tensile stress is closest to:

Q182. A steel pin carries a tensile load of 4500 N. Its cross-sectional area is 57 mm². The tensile stress is closest to:

Q183. A steel pin carries a tensile load of 5000 N. Its cross-sectional area is 64 mm². The tensile stress is closest to:

Q184. A steel pin carries a tensile load of 5500 N. Its cross-sectional area is 71 mm². The tensile stress is closest to:

Q185. A steel pin carries a tensile load of 6000 N. Its cross-sectional area is 78 mm². The tensile stress is closest to:

Q186. A steel pin carries a tensile load of 6500 N. Its cross-sectional area is 85 mm². The tensile stress is closest to:

Q187. A steel pin carries a tensile load of 7000 N. Its cross-sectional area is 92 mm². The tensile stress is closest to:

Q188. A steel pin carries a tensile load of 7500 N. Its cross-sectional area is 99 mm². The tensile stress is closest to:

Q189. A steel pin carries a tensile load of 8000 N. Its cross-sectional area is 106 mm². The tensile stress is closest to:

Q190. A steel pin carries a tensile load of 8500 N. Its cross-sectional area is 113 mm². The tensile stress is closest to:

Q191. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 0.80 m?

Q192. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 1.15 m?

Q193. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 1.50 m?

Q194. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 1.85 m?

Q195. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 2.20 m?

Q196. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 2.55 m?

Q197. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 2.90 m?

Q198. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 3.25 m?

Q199. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 3.60 m?

Q200. Approximately what gauge pressure (above atmospheric) does water exert at a depth of 3.95 m?

Q201. A 0.6 kg ball moving at 8 m/s is brought to rest in 0.04 s. What is the average stopping force (magnitude)?

Q202. A 0.7 kg ball moving at 9 m/s is brought to rest in 0.05 s. What is the average stopping force (magnitude)?

Q203. A 0.8 kg ball moving at 10 m/s is brought to rest in 0.06 s. What is the average stopping force (magnitude)?

Q204. A 0.9 kg ball moving at 11 m/s is brought to rest in 0.07 s. What is the average stopping force (magnitude)?

Q205. A 1.0 kg ball moving at 12 m/s is brought to rest in 0.04 s. What is the average stopping force (magnitude)?

Q206. A 1.1 kg ball moving at 13 m/s is brought to rest in 0.05 s. What is the average stopping force (magnitude)?

Q207. A 1.2 kg ball moving at 14 m/s is brought to rest in 0.06 s. What is the average stopping force (magnitude)?

Q208. A 1.3 kg ball moving at 15 m/s is brought to rest in 0.07 s. What is the average stopping force (magnitude)?

Q209. A 1.4 kg ball moving at 16 m/s is brought to rest in 0.04 s. What is the average stopping force (magnitude)?

Q210. A 1.5 kg ball moving at 17 m/s is brought to rest in 0.05 s. What is the average stopping force (magnitude)?

Q211. A flywheel has moment of inertia 0.45 kg·m² and spins at 180 rpm. Approximately how much rotational kinetic energy does it have?

Q212. A flywheel has moment of inertia 0.50 kg·m² and spins at 200 rpm. Approximately how much rotational kinetic energy does it have?

Q213. A flywheel has moment of inertia 0.55 kg·m² and spins at 220 rpm. Approximately how much rotational kinetic energy does it have?

Q214. A flywheel has moment of inertia 0.60 kg·m² and spins at 240 rpm. Approximately how much rotational kinetic energy does it have?

Q215. A flywheel has moment of inertia 0.65 kg·m² and spins at 260 rpm. Approximately how much rotational kinetic energy does it have?

Q216. A flywheel has moment of inertia 0.70 kg·m² and spins at 280 rpm. Approximately how much rotational kinetic energy does it have?

Q217. A flywheel has moment of inertia 0.75 kg·m² and spins at 300 rpm. Approximately how much rotational kinetic energy does it have?

Q218. A flywheel has moment of inertia 0.80 kg·m² and spins at 320 rpm. Approximately how much rotational kinetic energy does it have?

Q219. A flywheel has moment of inertia 0.85 kg·m² and spins at 340 rpm. Approximately how much rotational kinetic energy does it have?

Q220. A flywheel has moment of inertia 0.90 kg·m² and spins at 360 rpm. Approximately how much rotational kinetic energy does it have?

Q221. A wrench of length 0.35 m has two perpendicular forces applied: 80 N turning it clockwise and 30 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q222. A wrench of length 0.40 m has two perpendicular forces applied: 90 N turning it clockwise and 35 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q223. A wrench of length 0.45 m has two perpendicular forces applied: 100 N turning it clockwise and 40 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q224. A wrench of length 0.50 m has two perpendicular forces applied: 110 N turning it clockwise and 45 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q225. A wrench of length 0.55 m has two perpendicular forces applied: 120 N turning it clockwise and 30 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q226. A wrench of length 0.35 m has two perpendicular forces applied: 130 N turning it clockwise and 35 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q227. A wrench of length 0.40 m has two perpendicular forces applied: 140 N turning it clockwise and 40 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q228. A wrench of length 0.45 m has two perpendicular forces applied: 150 N turning it clockwise and 45 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q229. A wrench of length 0.50 m has two perpendicular forces applied: 160 N turning it clockwise and 30 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q230. A wrench of length 0.55 m has two perpendicular forces applied: 170 N turning it clockwise and 35 N turning it counterclockwise at the same radius. What is the net torque (clockwise positive)?

Q231. Gear A (14 teeth) drives idler gear B (28 teeth), which drives gear C (21 teeth). If gear A spins at 120 rpm, gear C spins at about:

Q232. Gear A (16 teeth) drives idler gear B (29 teeth), which drives gear C (24 teeth). If gear A spins at 130 rpm, gear C spins at about:

Q233. Gear A (18 teeth) drives idler gear B (30 teeth), which drives gear C (27 teeth). If gear A spins at 140 rpm, gear C spins at about:

Q234. Gear A (20 teeth) drives idler gear B (31 teeth), which drives gear C (30 teeth). If gear A spins at 150 rpm, gear C spins at about:

Q235. Gear A (22 teeth) drives idler gear B (32 teeth), which drives gear C (21 teeth). If gear A spins at 160 rpm, gear C spins at about:

Q236. Gear A (24 teeth) drives idler gear B (33 teeth), which drives gear C (24 teeth). If gear A spins at 170 rpm, gear C spins at about:

Q237. Gear A (26 teeth) drives idler gear B (34 teeth), which drives gear C (27 teeth). If gear A spins at 180 rpm, gear C spins at about:

Q238. Gear A (28 teeth) drives idler gear B (35 teeth), which drives gear C (30 teeth). If gear A spins at 190 rpm, gear C spins at about:

Q239. Gear A (30 teeth) drives idler gear B (36 teeth), which drives gear C (21 teeth). If gear A spins at 200 rpm, gear C spins at about:

Q240. Gear A (32 teeth) drives idler gear B (37 teeth), which drives gear C (24 teeth). If gear A spins at 210 rpm, gear C spins at about:

Q241. A belt drive uses a 4-inch driver pulley turning at 900 rpm and a 10-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q242. A belt drive uses a 5-inch driver pulley turning at 950 rpm and a 12-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q243. A belt drive uses a 6-inch driver pulley turning at 1000 rpm and a 14-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q244. A belt drive uses a 7-inch driver pulley turning at 1050 rpm and a 16-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q245. A belt drive uses a 4-inch driver pulley turning at 1100 rpm and a 18-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q246. A belt drive uses a 5-inch driver pulley turning at 1150 rpm and a 20-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q247. A belt drive uses a 6-inch driver pulley turning at 1200 rpm and a 22-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q248. A belt drive uses a 7-inch driver pulley turning at 1250 rpm and a 24-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q249. A belt drive uses a 4-inch driver pulley turning at 1300 rpm and a 26-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q250. A belt drive uses a 5-inch driver pulley turning at 1350 rpm and a 28-inch driven pulley. Ignoring slip, the driven pulley speed is closest to:

Q251. A spring with k = 150 N/m is compressed 0.08 m. Approximately how much elastic potential energy is stored?

Q252. A spring with k = 175 N/m is compressed 0.09 m. Approximately how much elastic potential energy is stored?

Q253. A spring with k = 200 N/m is compressed 0.10 m. Approximately how much elastic potential energy is stored?

Q254. A spring with k = 225 N/m is compressed 0.11 m. Approximately how much elastic potential energy is stored?

Q255. A spring with k = 250 N/m is compressed 0.12 m. Approximately how much elastic potential energy is stored?

Q256. A spring with k = 275 N/m is compressed 0.08 m. Approximately how much elastic potential energy is stored?

Q257. A spring with k = 300 N/m is compressed 0.09 m. Approximately how much elastic potential energy is stored?

Q258. A spring with k = 325 N/m is compressed 0.10 m. Approximately how much elastic potential energy is stored?

Q259. A spring with k = 350 N/m is compressed 0.11 m. Approximately how much elastic potential energy is stored?

Q260. A spring with k = 375 N/m is compressed 0.12 m. Approximately how much elastic potential energy is stored?

Q261. Two resistors 4 Ω and 10 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q262. Two resistors 5 Ω and 9 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q263. Two resistors 6 Ω and 8 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q264. Two resistors 7 Ω and 7 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q265. Two resistors 8 Ω and 10 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q266. Two resistors 9 Ω and 9 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q267. Two resistors 10 Ω and 8 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q268. Two resistors 11 Ω and 7 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q269. Two resistors 12 Ω and 10 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q270. Two resistors 13 Ω and 9 Ω are connected in series across 24 V. What is the total power dissipated (approximately)?

Q271. An object displaces 0.015 m³ of water. What is the buoyant force on the object (approximately)?

Q272. An object displaces 0.017 m³ of water. What is the buoyant force on the object (approximately)?

Q273. An object displaces 0.019 m³ of water. What is the buoyant force on the object (approximately)?

Q274. An object displaces 0.021 m³ of water. What is the buoyant force on the object (approximately)?

Q275. An object displaces 0.023 m³ of water. What is the buoyant force on the object (approximately)?

Q276. An object displaces 0.025 m³ of water. What is the buoyant force on the object (approximately)?

Q277. An object displaces 0.027 m³ of water. What is the buoyant force on the object (approximately)?

Q278. An object displaces 0.029 m³ of water. What is the buoyant force on the object (approximately)?

Q279. An object displaces 0.031 m³ of water. What is the buoyant force on the object (approximately)?

Q280. An object displaces 0.033 m³ of water. What is the buoyant force on the object (approximately)?

Q281. Water speeds up from 2.0 m/s to 4.0 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q282. Water speeds up from 2.2 m/s to 4.3 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q283. Water speeds up from 2.4 m/s to 4.6 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q284. Water speeds up from 2.6 m/s to 4.9 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q285. Water speeds up from 2.8 m/s to 5.2 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q286. Water speeds up from 3.0 m/s to 5.5 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q287. Water speeds up from 3.2 m/s to 4.0 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q288. Water speeds up from 3.4 m/s to 4.3 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q289. Water speeds up from 3.6 m/s to 4.6 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q290. Water speeds up from 3.8 m/s to 4.9 m/s in a pipe at the same height. Ignoring losses, approximately how much does static pressure drop?

Q291. A heat engine takes in 500 J of heat and produces 175 J of work. What is its efficiency (closest)?

Q292. A heat engine takes in 550 J of heat and produces 202 J of work. What is its efficiency (closest)?

Q293. A heat engine takes in 600 J of heat and produces 230 J of work. What is its efficiency (closest)?

Q294. A heat engine takes in 650 J of heat and produces 227 J of work. What is its efficiency (closest)?

Q295. A heat engine takes in 700 J of heat and produces 255 J of work. What is its efficiency (closest)?

Q296. A heat engine takes in 750 J of heat and produces 282 J of work. What is its efficiency (closest)?

Q297. A heat engine takes in 800 J of heat and produces 280 J of work. What is its efficiency (closest)?

Q298. A heat engine takes in 850 J of heat and produces 308 J of work. What is its efficiency (closest)?

Q299. A heat engine takes in 900 J of heat and produces 335 J of work. What is its efficiency (closest)?

Q300. A heat engine takes in 950 J of heat and produces 332 J of work. What is its efficiency (closest)?