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Work and Energy Review

Total questions: 23

Worksheet time: 23mins

Name
Class
Date
1.
The energy associated with motion is called
a)
Kinetic energy
b)
Elastic potential energy
c)
Gravitational potential energy
d)
Nuclear energy
2.

Which formula should you use to calculate work?

a)

W = m·g

b)

W = m + g

c)

W = F·d

d)

W = F + d

3.

How much kinetic energy does a 0.2kg mouse-trap car have when it is rolling at 4 m/s?

a)

0.08 J

b)

0.4 J

c)

1.6 J

d)

3.2 J

e)

8 J

4.
A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?
a)
2000 Joules
b)
19,600 Joules
c)
19,600 m/s
d)
31.3 m/s
5.

1. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?

a)

0.26 m

b)

0.52 m

c)

5.2 m

d)

25 m

6.
Calculate the PE of a 2 kg cat perched 10 meters above the ground. 
a)
20 J
b)
200 J
c)
2.04 J
d)
200 W
7.
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
8.
True or false: when the distance an object moves is zero the work done on the object is also zero.  
a)
True
b)
False
9.
Belly-Flop Bernie dives from atop a tall flagpole into a swimming pool below. His potential energy at the top is 10,000J. What is his kinetic energy when his potential energy reduces to 9.7J?
a)
9.81J
b)
10,000J
c)
9.7J
d)
9,990.3J
10.
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
11.
While a boulder is on the top of a hill it has what type of energy? 
a)
Mechanical
b)
Kinetic
c)
Potential 
d)
Reactive 
12.

Work = (select all that apply)

a)

 ΔME\Delta ME  

b)

 F∥ dF_{\parallel}\ d  

c)

.5mv^2

d)

mgh

13.

Power=

a)

ΔME\Delta ME

b)

mgh

c)

worktime\frac{work}{time}

d)

F∥F_{\parallel} d

14.

What value(s) uses Joules (J)

a)

Power

b)

Energy (KE, PE, ME)

c)

Velocity

d)

Work

15.

Potential Energy is

a)

The amount of energy done in a given time

b)

Directly Related to the height

c)

Always an external force

d)

Stored Energy

16.

Power is measured in

a)

Joules (J)

b)

Fortnite Wins

c)

Newtons (N)

d)

Watts (W)

17.

Horsepower is a measure of

a)

Power

b)

Energy

c)

Work

d)

Spirit

18.

A 73 kg cheerleader is 3 meters in the air, what is her PE?

a)

2146 J

b)

219 J

c)

657 J

d)

3492 J

19.

If Dwayne the Rock Johnson pushes Kevin Hart in a stroller weighing 600N (together) a distance of 50 meters, how much work does he do?

a)

20,400 J

b)

0 J

c)

30,000 J

d)

5640 J

20.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
21.
You move an 8-newton weight five meters in 4 seconds. How much power have you generated?
a)
160 watts
b)
10 watts
c)
6.4 watts
d)
17 watts
22.
Which of the following would produce the most power?
a)
A mass of 10 kilograms lifted 10 meters in 10 seconds 
b)
A mass of 10 kilograms lifted 10 meters in 5 seconds
c)
A mass of 5 kilograms lifted 10 meters in 5 seconds
d)
A mass of 5 kilograms lifted 5 meters in 10 seconds
23.
True or false
You do work only when you exert a force on an object and move it
a)
true
b)
false

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