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WorksheetsWork, Power, Energy
Total questions: 62
Worksheet time: 46mins
Name
Class
Date
1.
What is the energy of position or shape that depends on weight and height, also called stored energy?
a)
Energy
b)
Kinetic energy
c)
Potential energy
d)
Sound energy
2.
units of force are
a)
netwons
b)
grams
c)
joules
d)
meters
3.
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
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.
Which of these is a measurement of power?
a)
100 joules
b)
100 watts
c)
100 meters per second
d)
100 hertz
6.
How do you know when a force has been applied to an object?
a)
It moves.
b)
It flies.
c)
It accelerates.
d)
It gets bigger.
7.
The faster an object moves, the ________ kinetic energy it has.
a)
more
b)
less
c)
none of the above
d)
all of the above
8.
which point has the most potential energy
a)
G
b)
f
c)
b
d)
a
9.
Which 2 letters have the most kinetic energy
a)
W & Y
b)
X & Z
10.
How much pontential energy is at the top of a hill on a rollar coaster ride
a)
100%
b)
50%
c)
0%
d)
20%
11.
Can energy be destroyed
a)
no
b)
yes
12.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
13.
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
14.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
15.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
16.
Energy can be _____________ or changed from one type to another.
a)
destroyed
b)
transferred
c)
created
d)
ignored
17.
Which would have the greatest gravitational potential energy?
a)
A 4lb rat on a school desk
b)
A 45lb dog in an oak tree
c)
A 14 pound platypus on a swing
d)
A 45lb child on a bike
18.
Roller coasters slow down because their energy disappears.
a)
True
b)
False
19.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
20.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
21.
What kind of energy is in flowerpot sitting on a windowsill?
a)
Potential
b)
Kinetic
22.
____________ is the ability to cause change.
a)
Energy
b)
Force
c)
Friction
d)
Motion
23.
A force of 15 newtons is used to push a box along the floor a distance of 3 meters. How much work was done?
a)
3 J
b)
45 J
24.
It took 50 joules to push a chair 5 meters across the floor. With what force wast the chair pushed?
a)
250N
b)
10N
25.
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
26.
It took 500 newtons of force to push a car 4 meters. How much work was done?
a)
2,000 J
b)
125 J
27.
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
28.
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
29.
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
30.
How much work is done using a 500 watt microwave oven for 5 minutes?
a)
150,000 J
b)
2500 J
31.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
32.
The SI unit of work is?
a)
Joules
b)
Watts
c)
Newtons
d)
meters
33.
The energy of movement is...?
a)
Kinetic
b)
Potential
34.
Energy that is stored is called...
a)
Kinetic
b)
Potential
35.
The SI unit for power is...?
a)
Watts
b)
Joules
c)
Newtons
d)
Meters
36.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
37.
Gravitational potential energy depends on the ________ and ________ of the object.
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction
38.
When you release a stretched rubber band, the rubber band has ________ energy.
a)
kinetic
b)
potential
c)
none of the above
d)
all of the above
39.
Elastic potential energy is energy stored in object that are compressed or __________.
a)
movement
b)
stored
c)
harnessed
d)
pulled
40.
What is energy in motion?
a)
potential energy
b)
thermal energy
c)
kinetic energy
d)
conserved energy
41.
What is energy at a stand still?
a)
potential energy
b)
thermal energy
c)
kinetic energy
d)
conserved energy
42.
What is the rate at which work is done?
a)
force
b)
work
c)
motion
d)
power
43.
What is the unit of measurement for power?
a)
watts
b)
newtons
c)
meters
d)
joules
44.
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
45.
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
46.
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
47.
1. A book weighing 1.0 newton is lifted 2 meters. How much work was done?
a)
2 J
b)
0.5 J
48.
A young man exerted a force of 9,000 newtons on a stalled car but was unable to move it. How much work was done?
a)
9,000 J
b)
0 J= No work
49.
How do we calculate work?
a)
W = F * d
b)
w = f * D
c)
W = F * D
d)
w = f * d
50.
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
51.
If 150 Joules of work is needed to move a box 10 meters, what force was used?
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
52.
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
53.
Why does the total amount of mechanical energy stay constant in a system?
a)
energy is not created or destroyed
b)
energy leaves
c)
energy enters
d)
energy is not converted from one form into another
54.
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
55.
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
56.
Which of the following is true about work?
a)
It measures how quickly an object accelerates
b)
It measures how much effort is applied over a distance.
c)
It measures the change of an object's rate of speed.
d)
It measures how much time it takes to move an object.
57.
When is positive work done?
a)
When an object moves in the same direction as its force.
b)
When an object moves in the opposite direction as its force.
c)
When a force causes the object to move more quickly.
d)
When an object stops moving.
58.
What units do we use to measure work?
a)
watts
b)
newtons
c)
joules
d)
meters
59.
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
60.
In which of these cases is work being done?
a)
A student sleeps all night.
b)
A student pushes a locked door that does not move.
c)
A student carries his chair into another room.
d)
A student sits on the carpet.
61.
A 500N block is lifted 10 m. How much work was done?
a)
5000 J
b)
500 J
c)
50 J
d)
5 J
62.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
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