Work Power and Energy Quiz

1.

Multiple Choice

1 min

1 pt

If you use 30 J of energy to move an object, you have done ____ J of work.

3

10

30

0

2.

Multiple Choice

1 min

1 pt

You push a crate with a force of 100 N for 5 meters. How much work did you do?

500 J

100 J

50 J

5 J

3.

Multiple Choice

1 min

2 pts

How much power is generated by Ashley (50 kg) running up a 6 m flight of stairs in 5 seconds?

60 W

62 W

600 W

1500 W

4.

Multiple Choice

1 min

1 pt

If you carry a 5 kg box across the room at a constant velocity

you do no work.

you do some work.

you do negative work.

Cannot be determined.

5.

Multiple Choice

1 min

1 pt

How much power was generated from 0-4 seconds?

1100 W

4 W

267 W

1600 W

6.

Multiple Choice

1 min

2 pts

How much work is done?

9 J

18 J

27 J

36 J

7.

Multiple Choice

1 min

1 pt

If you run up the stairs faster you will

do more work.

do less work.

generate more power.

generate less power.

8.

Multiple Choice

1 min

1 pt

What is the kinetic energy of a 10 kg ball moving at 3 m/s?

15 J

30 J

45 J

90 J

9.

Multiple Choice

1 min

1 pt

A 5 kg cat falls off a 3 m tall fridge. What is the cat's PE as it starts to fall?

15 J

30 J

150 J

1470 J

10.

Multiple Choice

1 min

1 pt

What is the mass of an object with 1200 J of PE when it is 5 meters above the ground?

10 kg

24 kg

100 kg

240 kg

11.

Multiple Choice

30 sec

2 pts

A boy pushes a lawn mower with a force of 300N at an angle of 25 degrees from horizontal. It takes 1 hour to mow a lawn 2 km in total distance. How much power was generated?

70 W

0.15 W

151 W

543,785 W

12.

Multiple Choice

45 sec

1 pt

Jack pushes a baby stroller with a force of 25N and performs 1000 J of work. How far did he push the mower?

0.025 kilometer

25000 meters

40 meters

none of these

13.

Multiple Choice

30 sec

2 pts

A pendulum hanging from a 3 m rope, with a mass of 1 kg, is pulled to an angle of 35 degrees from vertical. How much GPE does it have before being released?

5.3 J

24.1 J

29.4 J

50 J

14.

Multiple Choice

30 sec

2 pts

This weight lifter required 1029.7 newtons of force to bring the weights to a height of approximately 2.31 m in 9 seconds. How much power did he have?

264 Watts

1029 Watts

2,377 Watts

4,009 Watts

15.

Multiple Choice

30 sec

1 pt

Is this an example of work?

Yes

No

16.

Multiple Choice

30 sec

2 pts

A mover pulls a fridge up a 5 m long ramp, at a 20 degree angle to the ground. If the fridge has a mass of 200 kg, how much GPE does it have on the truck?

1000 J

9218 J

Not enough information to solve

3355 J

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