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WorksheetsCalculating Work and Power
Total questions: 20
Worksheet time: 16mins
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 ?
a)
200 J
b)
20.0J
c)
2 J
d)
200 N
2.
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 N
b)
6.0 J
c)
54 J
d)
27 J
3.
If a student uses 10 Newtons of Force to push a chair 5 meters, how much is work is being done?
a)
2 Joules
b)
.5 Joules
c)
50 Joules
d)
20 Newtons
4.
Which of the following IS NOT an example of work being done?
a)
Pushing a cart in a store
b)
Shooting a basketball
c)
A stand off in tug of war
d)
Running a mile
5.
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)
810 meters
b)
792 meters
c)
22 meters
d)
320 meters
6.
units of force are
a)
netwons
b)
grams
c)
joules
d)
meters
7.
A set of pulleys is used to lift a piano weighing 1,000 newtons. The piano lifted 3 meters in 60 seconds How much power is used?
a)
16.67 watts
b)
50 watts
8.
How much power is used if a force of 35 newtons is used to push a box a distance of 10 meters in 5 seconds?
a)
70 watts
b)
1750 watts
9.
What is the power of a kitchen blender if it can perform 3,750 joules of work in 15 seconds?
a)
56, 250 watts
b)
250 watts
10.
1. A book weighing 1.0 newton is lifted 2 meters. How much work was done?
a)
2 J
b)
0.5 J
11.
A force of 100 newtons was necessary to lift a rock. A total of 150 joules of work was done. How far was the rock lifted?
a)
1.5m
b)
15,000 m
12.
Two examples of a pulley?
a)
Knife and Flagpole
b)
Flagpole and Blinds
c)
Car and axe
d)
See-saw and Blind
13.
Calculate work for the following problem: F: 45 N; d: 4m
a)
120 J
b)
150 J
c)
180 J
d)
200 J
14.
Calculate the power for the following problem: w=350 J; t:20 s
a)
18.5 W
b)
16.5 W
c)
17.5 W
d)
20.5 W
15.
Calculate the power for the following problem: w: 253 J; t: 10 s
a)
25.3 W
b)
25.5 W
c)
25.6 W
d)
25.2 W
16.
Calculate the work for the following problem: F:63 N; d: 10m
a)
600 J
b)
630 J
c)
620 J
d)
650 J
17.
If a lion drags his prey 10 meters to his den doing 500 joules of work, how much force did he use?
a)
50 Newtons
b)
500 Joules
c)
50,000 Newtons
d)
10 Newtons
18.
Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
19.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
20.
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
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