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WorksheetsUnit 2: Lesson 1 - Work, Energy, and Power
Total questions: 25
Worksheet time: 38mins
Newtons are the correct unit for which of the following?
Force
Work
Power
Acceleration
Which is the correct unit for work?
Joules
Newton
meter
Watts
What is the correct unit for power?
Watt
Joules
Newtons
seconds
It took 50 Joules to push a chair 5 meters across the floor. With what force was the chair pushed?
10 N
0.1 N
250 N
1 N
What is the power of a kitchen blender if it can perform 3,750 Joules of work in 15 seconds?
250 W
0.004 W
56,250 W
25 W
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?
1.5 m
0.4 m
15,000 m
15 in
How much work is done using a 500-watt microwave oven for 1 minute? (Hint: Use seconds as the unit for time.)
30,000 J
500 J
8.3 J
0.12 J
The equation for work is
work = power x mass
work = power / time
work = force x distance
work = distance x time
What will be the formula if we are finding the TIME using the formula of power?
Time = powerwork done
Time = work donepower
Time = work x power
Two people shove on a wall with 100 N. The wall doesn’t move. How much work is done?
100J
100N
0J
0N
If you push a cart with a force of 60 N for 2 m... how much work have you done?
120 J
30 J
120 N
30 N
Calculate work: A 100 Newton force is applied to move a 15 kg object a distance of 5 meters?
20 Joules
75 Joules
500 Joules
1500 J
If 40 N of force is applied to a 10 kg cart over a distance of 50 meters, how much work is done?
8000 J
8000 N
4000 J
2000 J
If Boss uses 20 N of force to push a lawn mower 10 meters. How much work does he do?
200 N
200 J
10 N
10 J
A student lifts 100 N of books. He walks forward 10 m before taking a right, he then walks 20 m to reach class. How much work has been done?
No work is done
300 J
3000 N
3000 J
Panda balances a stationary coin on the tip of his finger 20 cm from the top of a table. How much work is he doing?
200 m
20 J
0 J (No work)
2 000 W
Billy does 2400 J of work in climbing a set of stairs. If he does the work in 6 seconds, what is his power output?
400 J
400 W
14,400 W
A small engine does 400 J of work in 20 seconds. What is the power of the engine in watts?
200 W
8,000 W
200 J
A rope is thrown over a beam, and one end is tied to a 300 N bundle of lumber. You pull the free end of the rope 2 m with a force of 400 N to life the lumber off the ground. How much work have you done?
1400 J
350 J
800 J
You run using a force of 210 N and a power output of 500 W. How long in minutes does it take you to complete 1km? (find work first)
T = Work (or energy) / power.
D = 1000 m
F = 210 N
P = 500 W
T = ?
7 mins
8 mins
9 mins
First takes 5 seconds to do 1,000 J of work, what is the power output?
200
20 W
200 N
200 W
A weight-lifter raises a 2000N weight through a vertical height of 2.0m in 0.80s. What useful power does he develop in doing this?
800 W
700W
4000W
5000W
P = T/E
