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MCQOPTIONS
This section includes 200950 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 2201. |
If instead one ball popped out with kinetic energy equal to the combined kinetic energy of the two, this would be a violation of conservation of _____. |
| A. | momentum |
| B. | energy. |
| C. | both of these |
| D. | neither of these. |
| Answer» B. energy. | |
| 2202. |
A car has a head-on collision with another car with the same magnitude of momentum. An identical car driving with the same speed as the first car runs into an enormously massive wall. The greater impulse will occur on the car that is in the collision with the ? |
| A. | approaching car. |
| B. | the wall |
| C. | both impulses will be the same |
| D. | |
| Answer» D. | |
| 2203. |
Two pool balls, each moving at 2 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 4 m/s. This collision violates conservation of ? |
| A. | momentum |
| B. | kinetic energy |
| C. | both of these |
| D. | none of these. |
| Answer» C. both of these | |
| 2204. |
A bullet has more kinetic energy than the recoiling rifle from which it is fired is because the force on the bullet acts over a longer __. |
| A. | time |
| B. | distance. |
| C. | both of these |
| D. | neither of these. |
| Answer» C. both of these | |
| 2205. |
An open freight car rolls friction free along a horizontal track in a pouring rain that falls vertically. As water accumulates in the car, the car's speed____. |
| A. | increases |
| B. | decreases |
| C. | doesn't change. |
| D. | |
| Answer» C. doesn't change. | |
| 2206. |
Compared to a recoiling rifle, the bullet fired has a greater ........ |
| A. | momentum |
| B. | kinetic energy |
| C. | none of these |
| D. | both of these. |
| Answer» C. none of these | |
| 2207. |
What does an object has when moving ,that it never has when at rest? |
| A. | momentum |
| B. | energy |
| C. | mass |
| D. | inertia |
| Answer» B. energy | |
| 2208. |
A heavy and a light object released from the same height in a vacuum have equal ? |
| A. | weights |
| B. | momenta |
| C. | energies. |
| D. | none of these. |
| Answer» E. | |
| 2209. |
If the speed of a moving object doubles, then what else doubles? |
| A. | momentum |
| B. | kinetic energy |
| C. | acceleration |
| D. | none of these |
| Answer» B. kinetic energy | |
| 2210. |
If an object has kinetic energy, then it also must have ? |
| A. | impulse. |
| B. | momentum. |
| C. | acceleration. |
| D. | force. |
| Answer» C. acceleration. | |
| 2211. |
A feather and a coin dropped in a vacuum fall with equal ? |
| A. | forces. |
| B. | momenta. |
| C. | accelerations. |
| D. | kinetic energies |
| Answer» D. kinetic energies | |
| 2212. |
An object at rest may have ? |
| A. | speed |
| B. | velocity. |
| C. | energy. |
| D. | momentum. |
| Answer» D. momentum. | |
| 2213. |
Whereas impulse involves the time that a force acts, work involves the ? |
| A. | distance that a force acts. |
| B. | time and distance that a force acts |
| C. | acceleration that a force produces. |
| D. | None of these |
| Answer» B. time and distance that a force acts | |
| 2214. |
When a rifle is fired it recoils so both the bullet and rifle are set in motion. The rifle and bullet ideally acquire equal? |
| A. | but opposite amounts of momentum |
| B. | amounts of kinetic energy |
| C. | both of these |
| D. | none of these. |
| Answer» B. amounts of kinetic energy | |
| 2215. |
A moving object has ? |
| A. | speed. |
| B. | velocit |
| C. | momentum |
| D. | all of these |
| Answer» E. | |
| 2216. |
On a sunny day about 500 watts of solar power strikes each square meter of the earth's surface. If a solar automobile has 4 square meters of collector area and 100% efficient collectors and motor, its power output is about ? |
| A. | 0.27 hp |
| B. | 2.7 hp |
| C. | 27 hp |
| D. | 270 hp. |
| Answer» C. 27 hp | |
| 2217. |
A flower pot of mass m falls from rest to the ground below, a distance h. Which statement is correct? |
| A. | The speed of the pot when it hits the ground is proportional to h. |
| B. | The KE of the pot when it hits the ground is proportional to h |
| C. | The KE of the pot when it hits the ground does not depend on m |
| D. | None of these is correct |
| Answer» C. The KE of the pot when it hits the ground does not depend on m | |
| 2218. |
How many Joules of energy are in one kilowatt-hour? |
| A. | 1 |
| B. | 60 |
| C. | 60,000 |
| D. | 3.6 million |
| Answer» E. | |
| 2219. |
A person on the edge of a roof throws a ball downward. It strikes the ground with 100 J of kinetic energy. The person throws another identical ball upward with the same initial speed, and this too falls to the ground. Neglecting air resistance, the second ball hits the ground with a kinetic energy of ? |
| A. | 100 J. |
| B. | 200 J |
| C. | less than 100 J. |
| D. | none of these. |
| Answer» B. 200 J | |
| 2220. |
Suppose a miracle car has a 100% efficient engine and burns fuel that has a 40-megajoules-per-liter energy content. If the air drag and overall frictional forces on this car traveling at highway speeds total 1000 N, what is the overall limit in distance per liter it could be driven on the highway? |
| A. | 30 km |
| B. | 40 km |
| C. | 50 km |
| D. | more than 50 km |
| Answer» C. 50 km | |
| 2221. |
car's engine is 20% efficient. When cruising, the car encounters an average retarding force of 1000 N. If the energy content of gasoline is 40 megajoules per liter,nhow many kilometers per liter does the car get? |
| A. | 14 |
| B. | 12 |
| C. | 10 |
| D. | 8 |
| Answer» E. | |
| 2222. |
If a power plant is 30% efficient, and the transmission system that delivers power to consumers is 60% efficient, then the overall efficiency is ? |
| A. | 90% |
| B. | 60% |
| C. | 30%. |
| D. | 18%. |
| Answer» E. | |
| 2223. |
Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate ? |
| A. | the same distance as the slower arrow. |
| B. | twice as far as the slower arrow. |
| C. | four times as far as the slower arrow. |
| D. | none of these. |
| Answer» D. none of these. | |
| 2224. |
Great saints believe that realisation of God will liberate man from ______ bondage and this state of release confers the privilege of serving the Lord in his ______ abode. |
| A. | materialistic, permanent |
| B. | earthly, transcendental |
| C. | primitive, unique |
| D. | spiritual, ethereal |
| Answer» C. primitive, unique | |
| 2225. |
A pulley system raises a 1000-N load with 100 N of input force. The efficiency of the system is ? |
| A. | 10% |
| B. | 90% |
| C. | 1000% |
| D. | not enough information given |
| Answer» E. | |
| 2226. |
Which requires the most amount of work on the brakes of a car? |
| A. | slowing down from 100 km/h to 70 km/h |
| B. | slowing down from 70 km/h to a stop |
| C. | equal amounts for either |
| D. | None of these |
| Answer» B. slowing down from 70 km/h to a stop | |
| 2227. |
A jack system will increase the potential energy of a heavy load by no more than 1000 J with a work input of 2000 J. The efficiency of the jack system is no more than ? |
| A. | 10% |
| B. | 20%. |
| C. | 50% |
| D. | not enough information given. |
| Answer» D. not enough information given. | |
| 2228. |
A car that travels twice as fast as another when braking to a stop will skid ? |
| A. | twice as far |
| B. | four times as far. |
| C. | depends on the mass of the cars. |
| D. | thrice time as far |
| Answer» C. depends on the mass of the cars. | |
| 2229. |
Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the mass traveling at 60 km/hr? |
| A. | the 30 km/hr car |
| B. | the 60 km/hr car |
| C. | Both have the same kinetic energy |
| D. | |
| Answer» C. Both have the same kinetic energy | |
| 2230. |
Consider a hydraulic press. When the input piston is depressed 20 cm, the output piston is observed to move 1 cm. On the same press, an input force of 1 N can raise no more than ? |
| A. | 1 N |
| B. | 10 N. |
| C. | 20 N |
| D. | 21 N |
| Answer» D. 21 N | |
| 2231. |
A 2500-N pile-driver ram falls 10 m and drives a post 0.1 m into the ground. The average impact force on the ram is ? |
| A. | 2,500 N |
| B. | 25,000 N. |
| C. | 250,000 N |
| D. | 2,500,000 N. |
| Answer» D. 2,500,000 N. | |
| 2232. |
A diver who weighs 500 N steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of ? |
| A. | 10 J. |
| B. | 500 J. |
| C. | 510 J. |
| D. | 5000 J. |
| Answer» E. | |
| 2233. |
A car moving at 50 km/hr skids 20 m with locked brakes. How far will the car skid with locked brakes if it is traveling at 150 km/hr? |
| A. | 20 m |
| B. | 60 m |
| C. | 120 m |
| D. | 180 m |
| Answer» E. | |
| 2234. |
A machine puts out 100 Watts of power for every 1000 Watts put into it. The efficiency of the machine is ? |
| A. | 10%. |
| B. | 50%. |
| C. | 90%.. |
| D. | 110% |
| Answer» B. 50%. | |
| 2235. |
An ungloved fist will do more damage to a jaw than a gloved fist. The reason for this is that the ungloved fist ? |
| A. | delivers a larger impulse to the jaw. |
| B. | exerts a larger force on the jaw |
| C. | has less air resistance on it |
| D. | none of these |
| Answer» C. has less air resistance on it | |
| 2236. |
A woman lifts a box from the floor. She then moves with constant speed to the other side of the room, where she puts the box down. How much work does she do on the box while walking across the floor at constant speed? |
| A. | zero J |
| B. | more than zero J |
| C. | more information needed to determine |
| D. | |
| Answer» B. more than zero J | |
| 2237. |
One end of a long, uniform log is raised to shoulder level. Another identical log is raised at its center to the same level. Raising the second log requires about ____. |
| A. | the same amount of work |
| B. | twice as much work. |
| C. | more than twice as much work |
| D. | None of these |
| Answer» C. more than twice as much work | |
| 2238. |
Strictly speaking, if any electrical device in your car is turned on (such as an air conditioner, headlights, or even a radio) more gasoline is burned by the engine. This statement is ? |
| A. | totally false |
| B. | true only if the car's engine is running |
| C. | true only if the car's engine is stopped |
| D. | almost always true. |
| Answer» E. | |
| 2239. |
Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate ? |
| A. | the same distance as the slower arrow. |
| B. | twice as far as the slower arrow. |
| C. | four times as far as the slower arrow. |
| D. | more than four times as far as the slower arrow |
| Answer» C. four times as far as the slower arrow. | |
| 2240. |
A car moves 4 times as fast as another identical car. Compared to the slower car, the faster car has ? |
| A. | 4 times the |
| B. | 8 times the KE |
| C. | 12 times the KE |
| D. | 16 times the KE. |
| Answer» E. | |
| 2241. |
A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is ? |
| A. | less than 100 J |
| B. | more than 100 J. |
| C. | 100 J |
| D. | not enough information given |
| Answer» B. more than 100 J. | |
| 2242. |
A heavy pile driver starting from rest falls on a pile with a force that depends on ____. |
| A. | the original height of the driver |
| B. | the original potential energy of the driver |
| C. | the distance the pile is moved. |
| D. | all of these. |
| Answer» E. | |
| 2243. |
Using 1000 J of work, a toy elevator is raised from the ground floor to the second floor in 20 seconds. How much power does the elevator use? |
| A. | 20 W |
| B. | 50 W |
| C. | 100 W |
| D. | 20000 W |
| Answer» C. 100 W | |
| 2244. |
A 2-kg mass has 40 J of potential energy with respect to the ground. Approximately how far is it located above the ground? |
| A. | 1 m |
| B. | 2 m |
| C. | 3 m |
| D. | 4 m |
| Answer» C. 3 m | |
| 2245. |
A 2-kg mass is held 4 m above the ground. What is the approximate potential energy of the mass with respect to the ground? |
| A. | 20 J |
| B. | 40 J |
| C. | 60 J |
| D. | 80 J |
| Answer» E. | |
| 2246. |
A TV set is pushed a distance of 2 m with a force of 20 N that is in the same direction as the set moves. How much work is done on the set? |
| A. | 2 J |
| B. | 10 J |
| C. | 20 J |
| D. | 40 J |
| Answer» E. | |
| 2247. |
Which requires more work: lifting a 50-kg sack vertically 2 meters or lifting a 25-kg sack vertically meters? |
| A. | Lifting the 50-kg sack |
| B. | Lifting the 25-kg sack |
| C. | Both require the same amount of work. |
| D. | None of them |
| Answer» D. None of them | |
| 2248. |
It takes 40 J to push a large box 4 m across a floor. Assuming the push is in the same direction as the move, what is the magnitude of the force on the box? |
| A. | 4 N |
| B. | 10 N |
| C. | 40 N |
| D. | 160 N |
| Answer» C. 40 N | |
| 2249. |
Neut exploding stars (supernovas) and thus _______ of one of the most _______ processes in nature. rons stars are believed to be the highly compressed remnants of |
| A. | causes, cataclysmic |
| B. | products, violent |
| C. | examples, equivocal |
| D. | justifications, harsh |
| Answer» C. examples, equivocal | |
| 2250. |
A 50-kg sack is lifted 2 meters in the same time as a 25-kg sack is lifted 4 meters. The power expended in raising the 50-kg sack compared to the power used to lift the 25-kg sack is ? |
| A. | twice as much |
| B. | half as much |
| C. | the same. |
| D. | None of these |
| Answer» D. None of these | |