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Work and Power Check-in

Total questions: 20

Worksheet time: 16mins

Name
Class
Date
1.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
2.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)

85200 N

c)

2.13 N

d)

2.13 J

3.

If 150 Joules of work is needed to move a box 10 meters, how much force was used? 

a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
4.

You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?

a)

Yes, work was done

b)

No, work wasn't done

5.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
6.

If you have the same work as someone, but in less time

a)

You are more powerful

b)

You are less powerful

c)

You have the same power

7.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

8.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
9.
The more POWER you use to move an object, the more work you do. 
a)
True
b)
False
10.
If 68 W of power is produced in 18 seconds, how much work is done?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
11.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
12.
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 
13.
The unit used to measure power is the 
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
14.

work transfers _____________

a)
sweat
b)
energy
c)
velocity
d)
effort
15.
units for work are
a)
netwons
b)
joules
c)
meters
d)
seconds
16.
How much work is produced when 350 N is used to move a car 5 m?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
17.
P=25 watts 
W=5000 Joules 
t=???
a)
200 sec
b)
0.0005 s
c)
125000 s
d)
125 s
18.
Power is defined as the quantity that measures the rate at which _____ is done or energy is transformed.
a)
energy
b)
time
c)
work
d)
elasticity
19.

What is the weight of a 25kg box on earth?

a)

25 kg

b)

25 N

c)

245 N

d)

245 kg

20.

A 3 kg puppy is sitting on the grass. Calculate the puppy's: gravitational potential energy, kinetic energy

a)

0 J, 0 J

b)

29.4 J, 0 J

c)

29.4 J, 1.5 J

d)

0 J, 1.5 J

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