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Worksheets

Kinetic and Potential Energy

Total questions: 50

Worksheet time: 4hrs 10mins

Name
Class
Date
1.

If you serve a volleyball with a mass of 2.1 kg and the ball leaves your hand with a speed of 30 m/s. This ball has ________ Energy. Calculate it.

a)

Kinetic ,945 J

b)

Potential, 945

c)

Kinetic, 618 J

d)

Potential, 618 J

2.

A baby carriage is sitting at the top of a high that is 21 m high. The carriage with the baby weighs 12 N. The carriage has ________ energy. Calculate it.

a)

Potential, 252 J

b)

Kinetic, 252 J

c)

Potential, 1512 J

d)

Kinetic, 1512

3.

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has _______ energy.

a)

Kinetic, 896000 J

b)

Potential, 896000J

c)

Kinetic, 439488 J

d)

Potential, 439488 J

4.

A cinder block is sitting on a platform 20 m high. The block has _____ energy.

a)

Potential, 1580 J

b)

Kinetic, 1580 J

c)

Potential, 15800 J

d)

Kinetic, 15800 J

5.

There is a bell at the top of a tower that is 45 m. The bell weights 190 N. The bell has _____ energy. Calculate it.

a)

Potential, 8550 J

b)

Kinetic, 8550 J

c)

Potential, 192375 J

d)

Kinetic, 192375 J

6.

A roller coaster is at the top of a 72 m hill and weighs 966 N. The coaster (at this moment) has ____ energy. Calculate it.

a)

Potential, 69552 J

b)

Kinetic, 69552 J

c)

Potential, 2503872 J

d)

Kinetic, 2503872 J

7.

What is the _______ energy of a 3 kg ball that is rolling at 2 meters per second?

a)

Kinetic, 6 J

b)

Potential, 6 J

c)

Kinetic, 58.86 J

d)

Potential, 58.86 J

8.

Two objects were lifted by a machine. One object had a mass of 2 kg, and was lifted at a speed of 2 m/s. The other had a mass of 4 kg and was lifted at a rate of 3 m/s. Which object had more kinetic energy while it was being lifted?

a)

4 kg object

b)

2 kg object

9.

Two objects were lifted by a machine. One object had a mass of 2 kg, and was lifted at a speed of 2 m/s. The other had a mass of 4 kg and was lifted at a rate of 3 m/s. Which object had more potential energy when it was lifted to a distance of 10 m?

a)

4 kg object

b)

2 kg object

10.

Relative to the ground, what is the gravitational potential energy of a 55 kg person who is at the top of the Sears Tower,a height of 443 m above the ground?

a)

239021 J

b)

5396850 J

c)

3398650 J

d)

4396850 J

11.

A hydroelectric power facility converts the gravitational potential energy of water behind a dam to electric energy. What is the gravitational potential energy relative to the generators of a lake volume 50 km^3 (mass = 5 *10^13 kg), given that the lake has an average height of 40 m above the generators?

a)

1.96 *10^16 J

b)

4.83 *10^13 J

c)

6.10^12 J

d)

2.38*10^15 J

12.

"Rocket man" has a propulsion unit strapped to his back. He starts form rest on the ground, fires the unit, and is propelled straight upward. At a height of 16 m, 5 m/s. His mass, including the propulsion unit, is about 136 kg. Find the work done by the force generated by the propulsion unit.

a)

2.3*10^4 J

b)

3.2*10^4 J

c)

4.5*10^4 J

d)

7.6*10^8 J

13.

Suppose a .350 kg eagle picks up a .075 kg and raises it 2.5 m from the ground to a branch. How much work did the bird do on the snake?

a)

1.8 J

b)

2.8 J

c)

8.1 J

d)

8.2 J

14.

Calculate the potential energy of a rock with a mass of 55 kg while sitting on a cliff that is 27 m high.

a)

14567.9 J

b)

20047.5 J

c)

40095 J

d)

10095 J

15.

An automobile is sitting on a hill which is 20 m higher than ground level. Find the potential energy given that its mass is 1848.11 kg.

a)

738244 J

b)

369622 J

c)

362600J

d)

405089J

16.

An automobile is sitting on a hill which is 20 m higher than ground level. Find the mass of the automobile if it contains 362,600 J of potential energy.

a)

1848.11 kg

b)

924.06 kg

c)

424.04 kg

d)

203.24 kg

17.

What distance is a book from the floor if the book contains 196 J of potential energy and has a mass of 5 kg?

a)

4 m

b)

6 m

c)

8 m

d)

20 m

18.

What is the potential energy that a book is 4 m from the floor and has a mass of 5 kg?

a)

196 J

b)

98 J

c)

49

d)

24.5 J

19.

What is the kinetic energy of a rock that has 55 kg if the rock rolls down the hill with a velocity of 8 m/s?

a)

1760 J

b)

11870 J

c)

3520 J

d)

5935 J

20.

Calculate the kinetic energy of a truck that has a mass of 2900 kg and is moving at 55 m/s.

a)

4386250 J

b)

8772500 J

c)

2193125 J

d)

109656 J

21.

Find the mass of a car that is traveling at a velocity of 60 m/s North. The car has 5,040,000 J of kinetic energy.

a)

2800 kg

b)

1400 kg

c)

168000 kg

d)

16800 kg

22.

How fast is a ball rolling if it contains 98 J of kinetic energy and has a mass of 4 kg?

a)

7 m/s

b)

14 m/s

c)

49 m/s

d)

24.5 m/s

23.

A 10 kg mass is lifted to a height of 2 m. What is the energy at this position?

a)

196.2 J

b)

98.1 J

c)

40 J

d)

20 J

24.

At what height is an object that has a mass of 16 kg, if its energy is 7500 J?

a)

47.78 m

b)

23.89 m

c)

486.75 m

d)

234.38 m

25.

What is the energy acquired by a hammer with a mass of .75 kg when raised 0.35 m?

a)

2.58 J

b)

1.43 J

c)

.1 J

d)

.05 J

26.

A book with a mass of 1 kg is dropped from a height of 3 m. What is the energy of the book when it reaches the floor?

a)

30 J

b)

15 J

c)

7.5 J

d)

3.25 J

27.

At what height is an object that has a mass of 50 kg, if its energy is 9800 J?

a)

20 m

b)

20 J

c)

10 m

d)

10 J

28.

What is the mass of an object if its energy is 3822 J and it is 15 m above the ground?

a)

26 kg

b)

26 J

c)

13 J

d)

13 kg

29.

An object with a mass of 20 kg and potential energy of 584 J is what distance above the ground?

a)

3 m

b)

3 J

c)

1.5 m

d)

1.5 J

30.

An object has a mass of 3 kg and is at a cliff that 40 m high. What is the energy of the object?

a)

1177.2 J

b)

588.6 J

c)

294 J

d)

194 J

31.

An object has an energy of 52 J and is located 18 m above the ground. What is the mass of the object?

a)

.30 J

b)

.15 J

c)

3.0J

d)

1.5J

32.

An object has an energy of 74 J with a mass of 3.8 kg. What is the position (height) the object is located?

a)

2 m

b)

4 m

c)

6 m

d)

10 m

33.

What is the energy of an object that has a mass of 5 kg and is positioned 22 m above the ground?

a)

1079.1 J

b)

539.55 J

c)

269.78 J

d)

134.88 J

34.

What is the energy of an object that has a mass of 0.6 kg and is moving at 3 m/s?

a)

.27 J

b)

.54 J

c)

2.7 J

d)

5.4 J

35.

What is the mass of an object that has an energy of 30 J and is moving at 2 m/s?

a)

15 kg

b)

7.5 kg

c)

3.25 kg

d)

2.13 kg

36.

What is the velocity an object that has an energy of 7.5 J and a mass of 1.6 kg?

a)

3.06 J

b)

9.37 J

c)

6.37 J

d)

1.43 J

37.

What is the energy of an object that has a mass of 2 kg and is moving at 22 m/s?

a)

484 J

b)

968 J

c)

203 J

d)

302J

38.

What is the energy of an object that has a mass of 3 kg and is moving at 4 m/s?

a)

24 J

b)

48 J

c)

12 J

d)

6 J

39.

What is the energy of an object that has a speed of 18 m/s and a mass of 5 kg?

a)

810 J

b)

1620 J

c)

2240 J

d)

4480J

40.

What is the energy of an object that has a mass of 3.8 kg and a speed of 8 m/s?

a)

121.6 J

b)

243.2 J

c)

486.4 J

d)

663.2 J

41.

What is the energy of an object that has a mass of 5 kg and a speed of 12 m/s?

a)

360 J

b)

720 J

c)

1440 J

d)

2880 J

42.

What is the energy of a hammer that is thrown at 5 m/s with a mass of .75 kg?

a)

1171.88 J

b)

2343.75 J

c)

4687.5 J

d)

9375 J

43.

A book that has a mass of 1kg is tossed at 3 m/s . What is the energy the book has at that moment?

a)

4.5 J

b)

9 J

c)

18 J

d)

22.5 J

44.

What is the energy of a 50 kg boulder that is thrown at 5 m/s?

a)

78125 J

b)

156250 J

c)

312500 J

d)

19531 J

45.

What is the energy of an object if it has a mass of 30 kg and is thrown at 15 m/s?

a)

3375 J

b)

6750 J

c)

13500 J

d)

2700 J

46.

An object with a mass of 20kg is thrown at 10 m/s. What is the energy of the object?

a)

1000 J

b)

2000 J

c)

3000 J

d)

4000 J

47.

A 10 kg car is moving at 2 m/s. What is the energy of the car?

a)

20 J

b)

40 J

c)

10 J

d)

30 J

48.

An object with a mass of 16 kg is moving at 7.5 m/s. What is the energy of the object?

a)

450 J

b)

225 J

c)

900 J

d)

1800 J

49.

What is the energy of an object if has a 55 kg and is moving at 5 m/s?

a)

85937.5 J

b)

42968.8 J

c)

21484.4 J

d)

10742.2 J

50.

What is the energy of an object that has a mass of 290 kg and is moving at 2 m/s?

a)

580 J

b)

1160 J

c)

2320 J

d)

4640 J