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WorksheetsEnergy Work & Power
Total questions: 50
Worksheet time: 50mins
Name
Class
Date
1.
What is kinetic energy?
a)
Stored energy of an elastic or springlike object
b)
The attraction between two objects
c)
Energy of motion
d)
Stored energy
2.
Potential Energy is...
a)
Stored energy of an object based on its height off of the ground
b)
Energy stored in molecules like our food
c)
Energy of motion
d)
Stored energy
3.
Conservation is...
a)
The amount of matter in an object
b)
A push or a pull
c)
The idea that energy cannot be created or destroyed, it can only change forms
d)
Stored energy of an elastic or springlike object
4.
Gravitational Potential Energy (GPE) is defined as....
a)
Stored energy of an elastic or springlike object
b)
Stored energy
c)
Stored energy of an object based on its height off of the ground
d)
The attraction between two objects
5.
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)
20.0J
c)
100 J
d)
10 J
6.
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
7.
units for work are
a)
netwons
b)
joules
c)
meters
d)
seconds
8.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
9.
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
10.
Work done = Force x blank?
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
11.
If you do 40 joules of work lifting a 10N box, how high is the shelf you move it to.
a)
400m
b)
40m
c)
50m
d)
4m
12.
In which of the following situations do your arms do work on books?
a)
holding a heavy stack of books while standing
b)
carrying a heavy stack of books
c)
dropping a stack of books onto a table
d)
picking up a pile of books from the floor
13.
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
14.
Ms. McDonald holds a desk perfectly still above her head. If she holds the desk at a height of 0.5 meters above her head, and applis 68 Newtons of force to do so, how much work has she done?
a)
34 Joules
b)
0 Joules
15.
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
16.
How are force and distance related?
a)
As distance increases, force increases.
b)
As distance increases, force decreases.
17.
You serve a volleyball with a mass of 2 kg. The ball leaves your hand with a speed of 30 m/s. What is the KE of the ball?
a)
900 J
b)
1800 J
c)
60 J
d)
30 J
18.
There is a bell at the top of a tower that is 45 m high. The bell weighs 100 kg. What is the potential energy of the bell?
a)
980 J
b)
441 J
c)
4,500 J
d)
44,100 J
19.
An 2 kg apple is hanging in a tree, 10 ft off the ground. What is the gravitational potential energy of the apple?
a)
19.6 J
b)
20 J
c)
98 J
d)
196 J
20.
Which of the following has the GREATEST IMPACT on the kinetic energy of an object?
a)
Mass
b)
Velocity
c)
Height
d)
The acceleration due to gravity
21.
A skydiver jumps from a plane and is halfway through her descent. At this point in time she has...
a)
Kinetic Energy
b)
Gravitational Potential Energy
c)
Both Kinetic and Gravitational Potential Energy
d)
She has no energy
22.
Which of the following has the greatest amount of kinetic energy?
a)
A small baby running at 15 m/s
b)
A toddler running at 15 m/s
c)
Mrs. Rewerts running at 15 m/s
d)
Arnold Schwarzenegger running at 15 m/s screaming "Get to the choppa!"
23.
At which point is potential energy greatest
a)
W
b)
X
c)
Y
d)
Z
24.
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?
a)
Both the potential energy and kinetic energy decrease
b)
The potential energy decreases while the kinetic energy increases
c)
The kinetic energy decreases while the potential energy increases
d)
Bothe the potential energy and kinetic energy increase
25.
At which point is kinetic energy greatest
a)
W
b)
X
c)
Y
d)
Z
26.
When a pendulum swings, at which point is kinetic energy highest:
a)
1
b)
2
c)
3
d)
4
27.
When a pendulum swings, at which point is potential energy at its greatest
a)
1
b)
2
c)
3
d)
4
28.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
29.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
30.
What kind of energy is in gasoline in a car tank (car is not on)?
a)
Potential
b)
Kinetic
31.
What kind of energy is in basketball passing through the hoop?
a)
Potential
b)
Kinetic
32.
What kind of energy is in a person climbing a ladder?
a)
Potential
b)
Kinetic
c)
Both
33.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
34.
P=25 watts
W=5000 Joules
t=???
W=5000 Joules
t=???
a)
200 sec
b)
0.0005 s
c)
125000 s
d)
125 s
35.
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used?
a)
360 W
b)
60 W
c)
3600 W
d)
600 W
36.
An engine reaches its top speed from rest in 7.5 s. It is able to perform 250,000 J of work in that time. How much power does this engine have in that time?
a)
0.00003 W
b)
33,333 W
c)
1,875,000 W
d)
1873 W
37.
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
38.
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
39.
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
40.
How much power did the Delorean in Back to the Future need in order to get the Flux Capacitor to send it back to 1985?
a)
5,000 Wattts
b)
10,000 Watts
c)
4 Gigawatts
d)
1.21 Gigawatts
41.
What is the definition of power?
a)
the amount of work an object does
b)
the rate at which force is applied
c)
the amount of matter in an object
d)
the rate at which work is done
42.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
43.
What is the equation for work?
a)
W = mass * acceleration
b)
W = force * distance
c)
W = force/distance
d)
W = speed/time
44.
As the amount of work a person does increases in the same amount of time the person...
a)
delivers more power
b)
delivers less power
c)
delivers the same amount of power
d)
power rating can not be determined
45.
If a new fork lift can do four times the amount of work in the same amount of time of an old forklift, then the new forklift is...
a)
Twice as powerful
b)
Four time as powerful
c)
Sixteen times the power
d)
of equal power of the old forklift
46.
Person A is twice the weight of Person B and climb the same hill. If person A gets the top in half the time then...
a)
Person A is twice as powerful
b)
Person B is twice as powerful
c)
Person A is four times as powerful
d)
Person B is four times as powerful
47.
Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?
a)
4100 J
b)
3100 J
c)
5100 J
d)
8100 J
48.
Which is doing work?
a)
pushing a wall
b)
holding a box
c)
picking up a pencil
d)
sitting in a chair
49.
A kid throws a ball with a force of 70N over 1.1 meters. How much work did he do?
a)
77 joules
b)
70 joules
c)
7.7 joules
d)
11 joules
50.
720 Joules
90 Watts
How much time?
90 Watts
How much time?
a)
0.125s
b)
8s
c)
64800s
d)
20s
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