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Work Calculations Physics

Total questions: 24

Worksheet time: 40mins

Name
Class
Date
1.

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?

a)

200 J

b)

20.0 J

c)

100 J

d)

10 J

2.
Two factors that determine work are
a)
size of the force, and distance
b)
size of the force, and type of force
c)
mass, and distance
3.
units for work are
a)
netwons
b)
joules
c)
meters
d)
seconds
4.

if you push a cart with a force of 60 N for 2 m... how much work have you done?

a)

120 J

b)

30 J

c)

120 N

d)

30 N

5.

Work done = Force x __?__

a)

a. distance

b)

b. acceleration

c)

c. velocity

d)

d. speed

6.

You apply a force of 18 N to a dresser and move it 3.0 m. How much work did you do on the dresser?

a)

54 J

b)

6.0 J

c)

21 J

d)

27 J

7.

I do 132 Joules of work on a bookcase. If I apply a force of 6 Newtons, how far have I moved the bookcase?

a)

22 meters

b)

792 meters

c)

17 meters

d)

320 meters

8.
Calculate the work needed to raise a 3 kg cat up to a height of
4 m.
a)
12 J
b)
0 J
c)
120 J
d)
1.22 J
9.
What is the work done when a 20-N force pushes a cart 3.5 m?
a)
70J
b)
6.8J
c)
23.5J
d)
17.5J
10.
 The law of conservation of energy states that when one form of energy is converted into another,
a)
Energy is destroyed in the process
b)
Energy is created in the process
c)
No energy is destroyed in the process
d)
Energy is lost in the process
11.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
12.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
13.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
14.
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
a)
272 m
b)
17 m
c)
4.05 m
d)
272 cm 
15.

If the marble had a mass of 0.3kg and the hill was 2.3 m tall, how much potential energy did it have at the top of the ramp?

a)

2.3

b)

.23

c)

6.9

d)

5.2

16.

If the 0.3 kg marble was moving at 6 m/s at the bottom of the ramp, how much kinetic energy did the marble have?

a)

5.4 J

b)

1.8 J

c)

3 J

d)

6 J

17.

What does conservation of energy mean?

a)

Total energy increases

b)

Total energy decreases

c)

Total energy stays the same

18.

If the 1.2 kg basketball rolls at 3 m/s, what is it's kinetic energy?

a)

2.7

b)

5.4

c)

3.6

d)

9

19.

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

a)

250,000 J

b)

2,450,000 J

c)

2,451,663 J

d)

248 J

20.

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?

a)

8.5 J

b)

45 J

c)

7.5 J

d)

22.5 J

21.

Alice kicks a soccer ball with a mass of 2.1 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energy of the soccer ball?

a)

567 J

b)

900 J

c)

945 J

d)

30 J

22.

Ty lifts a set of 1250kg weights a vertical distance of 2m in a weight lifting contest. What Potential Energy do the weights now possess?

a)

12,789 Joules

b)

24,500 Joules

c)

4,500 Joules

23.

What is the mechanical energy of a train that has 100 J of Kinetic Energy and 100 J of Potential Energy?

a)

200 J

b)

10 J

c)

100 J

d)

1,000 J

24.

If a bird with a mass of 1kg is flying 1 m/s 10 meters in the air, what is the mechanical energy? (find KE and GPE, add them together.)

a)

80.5 J

b)

90 J

c)

100 J

d)

98.5 J