1. An object is raised above the ground gaining a certain amount of potential energy. If the same object is raised twice as high it gains __________.
Useful Web Links 

2. When an object is lifted 10 meters, it gains a certain amount of potential energy. If the same object is lifted 20 meters, its potential energy is _____.
a. less 
b. the same 
c. twice as much 
d. four times as much 
e. more than 4 time as much 
Useful Web Links 

3. A 1000 kg car and a 2000 kg car are hoisted the same distance at constant speed in a gas station. Raising the more massive car requires ____________.
a. less work 
b. as much work 
c. twice as much work. 
d. four times as much work 
e. more than 4 times as much work 
Useful Web Links 

4. An object that has kinetic energy must be ____________.
a. moving 
b. falling 
c. at an elevated position 
d. at rest 
e. none of these 
Useful Web Links 

5. An object that has potential energy has this energy because of its _____________.
a. speed 
b. acceleration 
c. momentum 
d. position 
e. none of these 
Useful Web Links 

6. An arrow is drawn so that it has 40 J of potential energy. When fired horizontally, the arrow will have a kinetic energy of ________.
a. less than 40 J 
b. more than 40 J 
c. 40 J 
Useful Web Links 

7. 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 
e. none of these 
Useful Web Links 

8. 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 
e. none of these 
Useful Web Links 

9. 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. 100 J 
c. more than 100 J 
d. not enough information given 
Useful Web Links 

10. A woman lifts a box from the floor. She then carries 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 
Useful Web Links 

11. 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. 90 m 
d. 120 m 
e. 180 m 
Useful Web Links 

12. Which has greater kinetic energy, a car traveling at 30 km/hr or a halfasmassive car traveling at 60 km/hr?
a. the 30 km/hr car 
b. the 60 km/hr car 
c. both have the same kinetic energy 
Useful Web Links 

13. 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 
e. more than 5000 J. 
Useful Web Links 

14. 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. 2500 N 
b. 25000 N 
c. 250,000 N 
d. 2,500,000 N 
Useful Web Links 

15. 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 resitance, the second ball hits the ground with a kinetic energy of ______________.
a. 100 J 
b. 200 J 
c. less than 100 J 
d. more than 200 J 
e. none of these 
Useful Web Links 

16. A 10 N object moves at 1 m/s. Its kinetic energy is ____________.
a. 0.5 J 
b. 1 J 
c. 10 J 
d. more than 10 J 
Useful Web Links 

17. A moving object has __________.
a. speed 
b. velocity 
c. momentum 
d. energy 
e. all of these 
Useful Web Links 

18. An object at rest may have __________.
a. speed 
b. velocity 
c. momentum 
d. energy 
e. all of these 
Useful Web Links 

19. What does an object have when it is moving that it absolutely doesn`t have when at rest?
a. momentum 
b. energy 
c. mass 
d. inertia 
e. none of these 
Useful Web Links 

20. If an object has kinetic energy, then it also must have ___________.
a. impulse 
b. momentum 
c. acceleration 
d. force 
e. none of these 
Useful Web Links 

21. If the speed of a moving object doubles, then what else doubles?
a. momentum 
b. kinetic energy 
c. acceleration 
d. all of the above 
e. none of these 
Useful Web Links 

22. A popular swingingballs apparatus consists of an aligned row of identical elastic balls that are suspended by strings so they barely touch each other. When two balls are lifted from one end and released, they strike the row and two balls pop out from the other end. If instead one ball popped out with twice the velocity of the two, this would be violation of conservation of __________.
a. momentum 
b. kinetic energy 
c. both of these 
d. none of these 
Useful Web Links 

23. A 2 kg mass has a velocity of 4 m/s. The kinetic energy of the mass is ___ Joules.
a. 4 
b. 8 
c. 16 
d. 32 
e. none of these 
Useful Web Links 

24. A car moving at 50 km/hr skids 20 meters 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. 90 m 
d. 120 m 
e. 180 m 
Useful Web Links 

25. A 50 kg diver hits the water below (at a zero height) with a kinetic energy of 5000 Joules. The height from which the diver dove was ____ meters.
a. 5 
b. 10 
c. 50 
d. 100 
Useful Web Links 

26. A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of work, but different amounts of ___________.
a. energy 
b. power 
c. both of these 
d. none of these 
Useful Web Links 

27. Which requires more work: lifting a 50 kg sack vertically 2 meters or lifting a 25 kg sack vertically 4 meters?
a. lifting the 50 kg sack 
b. lifting the 25 kg sack 
c. both require the same amount of work 
Useful Web Links 

28. 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 
Useful Web Links 

29. 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 
e. 80 J 
Useful Web Links 

30. 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 
e. none of these 
Useful Web Links 

31. 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. 1000 W 
e. 20000 W 
Useful Web Links 

32. Calculate the work required lift a 2.5kg object a height of 6.0 meters. PSYW
Useful Web Links 

33. In the It's All Uphill Lab, a force of 21.2 N is applied parallel to the incline to lift a 3.0kg loaded cart to a height of 0.45 m along an incline which is 0.636m long. Determine the work done upon the cart and the subsequent potential energy change of the cart. PSYW
Useful Web Links 

34. An 800kg car skids to a stop across a horizontal surface over a distance of 45 m. The average force acting upon the car is 7000N, then determine
Useful Web Links 

35. A 50kg hiker ascends a 40meter high hill at a constant speed of 1.2 m/s. If it takes 400 s to climb the hill, then determine
Useful Web Links 

36. Neel, whose mass is 75kg, ascends the 1.6meter high stairs in 1.2 s. Determine Neel's power rating. PSYW
Useful Web Links 

37. A 500kg roller coaster car starts at a height of 32.0 m. Assuming negligible energy losses to friction and air resistance, determine the PE, KE, and speed of the car at the various locations (A, B, C, D, and E) along the track.








































Useful Web Links 

38. Use the information in the above table to explain what is meant when it is said that the "total mechanical energy is conserved."
Useful Web Links 

39. Use the workenergy theorem to determine the force required to stop a 1000kg car moving at a speed of 20.0 m/s if there is a distance of 45.0 m in which to stop it. PSYW
Useful Web Links 

40. A 60kg skiier accelerates down an icey hill from an original height of 500 meters. Use the workenergy theorem to determine the speed at the bottom of the hill if
Useful Web Links 

[ Questions #1#16  Questions #17#31  Questions #32#40 ] 



[ Course Calendars  Makeup Labs  Physics Classroom  Multimedia Physics Studios  The Quiz Room  Packet Solutions (P163)  Extra Credit  Reviews  P173 Internet Problems  ChemPhys Internet Problems  P163 Projects  The Refrigerator  Miscellaneous Help  EMail Physics Teachers  Conceptual Physics  Physics 163  Physics 173  Chem  Phys  AP Physics  GBS Physics Home Page  GBS Science Home Page ]
Comments and suggestions can be sent by email to Tom Henderson.
This page last updated on Jamuary 7, 2000.