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work energy power

Total questions: 114

Worksheet time: 2hrs 27mins

Name
Class
Date
1.

Suppose that you apply a 100 Newton horizontal force to a box on the floor, which pushes the box 10 meters. How much work do you do on the box?

a)

100 J

b)

1 J

c)

1000J

d)

10000J

e)

1 kJ

2.

What are the units for Work?

a)

Joules (J) or Newton (N)

b)

Joules (J) or Newton.meters (N.m)

c)

Pascal (P) or Newton (N)

d)

Pascal (P) or Joules (J)

3.

A force of 1500 N is applied during the drive off from a sprint start. The centre of mass moves a distance 0.4 m. What work is done?

a)

1200 J

b)

1500 J

c)

3750 J

d)

600 J

4.

A long jumper with a mass of 60 kg approaches the take-off board with a velocity of 11m.s-1. What is their linear kinetic energy?

a)

3630 J

b)

1047.2 J

c)

1045.4 J

d)

3330 J

5.

You push a crate with a force of 100 N for 5 meters. How much work did you do?

a)

500 J

b)

100 J

c)

50 J

d)

5 J

6.

How much power does it take to lift 30.0 kg 10.0 m high in 5.00 s?

a)

40

b)

60

c)

30

d)

300

7.

How much gravitational potential energy does a 100kg (220lb.) skydiver have if they jump from 4000 meters?

a)

3920000 J

b)

294 J

c)

180000 J

d)

1225 J

8.

A 6kg cat misjudges a jump and falls 5 meters. How much gravitational potential energy does the cat have? (The cat is fine by the way.)

a)

294 J

b)

180000 J

c)

1225 J

d)

3920000 J

9.

A 50kg person is running at 7m/s (about 16 mph). How much kinetic energy do they have?

a)

1225 J

b)

180000 J

c)

294 J

d)

3920000 J

10.
How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?
a)
27 J
b)
18 J
c)
9 J
d)
2 J
11.

The unit of work is

a)

watt

b)

hertz

c)

joule

d)

pascal

12.

Which requires more WORK – a person WALKING up stairs OR a person RUNNING up stairs?

a)

walking

b)

running

c)

they require equal work

d)

no work is required for either because the movement is vertical

13.

As speed increases, kinetic energy

a)

Increases

b)

Decreases

c)

Stays the same

d)

Increase then decrease

14.

The kid at the top of the roller coaster car pictured here has

a)

100% Potential Energy

0% Kinetic Energy

b)

75% Potential Energy

25% Kinetic Energy

c)

50% Potential Energy

50% Kinetic Energy

d)

0% Potential Energy

100% Kinetic Energy

15.
What type of energy is in this picture?
a)
Kinetic
b)

Elastic Potential

c)

Gravitational Potential

d)
Sound
16.

What is energy?

a)

Force

b)

The ability to do work

c)

Electricity

d)

The ability to transform work

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.

How much work is done against gravity lifting a 2 kg-sack of groceries a distance of 2.5 meters?

a)

24.4N

b)

5N

c)

19.6N

d)

49N

19.

A machine exerts a force of 300 N to push a box 30.0 m horizontally in 3.00 s. Calculate the power of the machine.

a)

27000 W

b)

100 W

c)

10 W

d)

3000 W

20.

Which object has the most amount of work done on it?

a)

W

b)

X

c)

Y

d)

Z

21.
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
22.

Which does not illustrate kinetic energy?

a)

It is expressed in Joule.

b)

It depends upon the objects’ mass and speed.

c)

It is the energy an object possesses due to its motion.

d)

It depends upon the objects’ mass and objects’ height.

23.

Which statement illustrates work done?

a)

A weightlifter holds a barbell above her head.

b)

A teacher applies a force to a wall and becomes exhausted.

c)

A rolling marble hits a note card and moves it across a table.

d)

A waiter carries a tray full of meals across a dining room at a constant speed.

24.

A weightlifter holds a 100 kg barbell above her head. Is work done?

a)

Yes because there is a force applied to the barbell and the force causes a displacement of the barbell.

b)

Yes because there is an upward force applied to the barbell and the barbell moves vertically.

c)

No because no displacement occurred.

d)

No because there is no force applied.

25.
Energy that is stored is called...
a)
Kinetic
b)
Potential 
26.
The energy of movement is...? 
a)
Kinetic
b)
Potential
27.

The SI unit of energy is?

a)
Joules
b)
Watts
c)
Newtons
d)
meters
28.

The equation for POTENTIAL ENERGY is

a)

PE = mass x gravity x height

b)

PE = gravity x weight

c)

PE = height / work

d)

PE = work / time

29.

The equation for KINETIC ENERGY is

a)

KE = mass x gravity

b)

KE = 1/2 height x speed

c)

KE = mass2

d)

KE = 1/2 mass x speed2

30.

________________ is the rate at which work is done.

a)

Power

b)

Work

c)

Time

d)

Energy

31.

The unit of power (aka Joule per second)

a)

Joule

b)

Minute

c)

Watt

d)

Pound

32.
Niagara Falls is a good example of
a)
Kinetic energy being transformed into potential energy
b)
Potential energy being transformed into kinetic energy
c)
Energy being created
d)
Energy being destroyed
33.
 The law of conservation of energy states that when one form of energy is converted into another,
a)
Energy is destroyed in the process
b)
Energy is created in the process
c)
No energy is destroyed in the process
d)
Energy is lost in the process
34.
The energy associated with motion is called
a)
Kinetic energy
b)
Elastic potential energy
c)
Gravitational potential energy
d)
Nuclear energy
35.
Which of the following has kinetic energy?
a)
a rock poised for a fall
b)
an archer's bow that is drawn back
c)
a rolling bowling ball
36.
When riding a roller coaster, you go up and down many hills. When do you have the maximum potential energy? 
a)
at the top of the hill
b)
as you go down each hill
c)
at the bottom of the each hill
d)
as you go up each hill
37.
Potential energy that depends on height is called
a)
Kinetic energy
b)
Elastic potential energy
c)
Nuclear energy
d)
Gravitational potential energy
38.
When you swing a bat and hit a baseball, the ball flies into the outfield. What happens to the energy you used to swing the bat?
a)
It disappears
b)
It remains in the bat.
c)
It is transferred to the baseball.
d)
It is converted into potential energy.
39.

What is the unit for energy?

a)

joule

b)

newton

c)

watt

d)

m/s/s

40.

Which of the following is NOT a representation of the correct units for energy?

a)

J

b)

N∙m

c)

kg∙m2/s2

d)

W

41.

Mechanical energy is the sum of an object’s kinetic energy and any potential energies.

a)

True

b)

False

42.

What are two things required for work to be done? Check all that apply.

a)

Force

b)

Distance

c)

Constant Speed

d)

Momentum

43.

At which point on the roller coaster is the kinetic energy at its maximum?

a)

A

b)

B

c)

C

d)

D

44.

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?

a)

The PE and KE increase and decrease together

b)

The PE decreases while the KE increases

c)

Impossible to know without knowing the mass

d)

The KE decreases while the PE increases

45.

Two balls, a bowling ball and a baseball, are both traveling with a velocity of 10 m/s. Which ball has the greater kinetic energy?

a)

The bowling ball

b)

The baseball

c)

They have the same

d)

Neither has kinetic energy

46.

A water balloon is launched off a building. Where in its trajectory does it have the most kinetic energy?

a)

As soon as it is released

b)

At the peak of its trajectory

c)

Just before it hits the ground

d)

Once it comes to rest on the ground

47.

A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ___________________ energy.

a)

only kinetic energy

b)

only potential energy

c)

mostly kinetic energy

d)

both kinetic and potential energy

48.
Energy that is stored is called...
a)
Kinetic
b)
Potential 
49.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
50.

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

51.
How can I gain potential energy? (choose the best answer)
a)
Run a mile
b)
Walk up the stairs
c)
Climb a mountain
d)
Go down the stairs
52.

A train begins a journey from a station and travels 60 km in a time of 20 minutes.

What is the average speed of the train?

A. 3.0 m/s

B. 5.0 m/s

C. 50 m/s

D. 60 m/s

a)

A

b)

B

c)

C

d)

D

53.

What is the potential energy of a 3kg ball that is on the ground?

a)

0 J

b)

3 J

c)

9.8 J

d)

29.4 J

54.

Which statement illustrates work done?

a)

A weightlifter holds a barbell above her head.

b)

A teacher applies a force to a wall and becomes exhausted.

c)

A rolling marble hits a note card and moves it across a table.

d)

A waiter carries a tray full of meals across a dining room at a constant speed.

55.

What is the energy possessed by the cart?

a)

potential energy

b)

kinetic energy

c)

mostly potential

d)

mostly kinetic

56.

Which of the following is defined as an energy transfer?

a)

kinetic energy

b)

work

c)

potential energy

d)

chemical energy

57.

A ball is dropped from a table-top. Air resistance may be ignored

a)

A

b)

B

c)

C

d)

D

58.
a)

A

b)

B

c)

C

d)

D

59.
a)

A

b)

B

c)

C

d)

D

60.
a)

A

b)

B

c)

C

d)

D

61.
a)

A

b)

B

c)

C

d)

D

62.

The force of gravity is dependent on an object's ________.

a)

mass

b)

volume

c)

temperature

d)

speed

63.

Newton's second law states that greater the mass the more _________ will be needed to move the object.

a)

power

b)

force

c)

distance

d)

speed

64.
If these teams are pulling with the same amount of force what will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
65.
A spring has a spring constant of 5N/cm.  What is its extension when loaded with 15N?
a)
4cm
b)
5cm
c)
3m
d)
3cm
66.

James weighs 200 N and sits 1 m from the pivot. Jane weighs 100 N. How far from the pivot must Jane be to balance the beam?

a)

0.5 m

b)

1 m

c)

2 m

d)

4 m

67.

A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ___________________ energy.

a)

only kinetic energy

b)

only potential energy

c)

mostly kinetic energy

d)

both kinetic and potential energy

68.

What is the potential energy of a 3kg ball that is on the ground?

a)

0 J

b)

3 J

c)

9.8 J

d)

29.4 J

69.

Which statement does not illustrate power?

a)

A farmer plowing the rice field all day.

b)

A Siberian husky pulling a sled all day.

c)

A principal sitting on a chair while observing several classes all day.

d)

A teacher encoding his power point presentation in his laptop all day.

70.

Who has the most power?

a)

Ms Calhoun who encodes her observation tools using 12000J of work in 20 minutes.

b)

Ms Dieck who studies his 5 lessons for the next classes in 15 minutes.

c)

Mr Clarkston who used 50N force to inoculate mushrooms at a speed of 2m/s.

d)

Mr Roy who watches her learners while taking their quiz in 30 minutes.

71.

A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?

a)

50J

b)

50W

c)

500J

d)

500W

72.

Which statement illustrates work done?

a)

A weightlifter holds a barbell above her head.

b)

A teacher applies a force to a wall and becomes exhausted.

c)

A rolling marble hits a note card and moves it across a table.

d)

A waiter carries a tray full of meals across a dining room at a constant speed.

73.

A weightlifter holds a 100 kg barbell above her head. Is work done?

a)

Yes because there is a force applied to the barbell and the force causes a displacement of the barbell.

b)

Yes because there is an upward force applied to the barbell and the barbell moves vertically.

c)

No because no displacement occurred.

d)

No because there is no force applied.

74.

What is the energy possessed by the cart?

a)

potential energy

b)

kinetic energy

c)

mostly potential

d)

mostly kinetic

75.

If the mass of the cart is 15kg, how much is the potential energy of the cart?

a)

0J

b)

1.2J

c)

6J

d)

58.8J

76.

If the mass of the cart is 8.12kg, what is the kinetic energy of the cart?

a)

0J

b)

1.2J

c)

6J

d)

58.8J

77.

If the mass of the cart is 8.12kg, what is the kinetic energy of the cart?

a)

0J

b)

1.2J

c)

6J

d)

58.8J

78.

How will you describe the energy at Point A?

a)

mostly potential energy

b)

mostly kinetic energy

c)

losing PE, gaining KE

d)

losing KE, gaining PE

79.

What is the total mechanical energy of the object?

a)

100J

b)

75J

c)

50J

d)

25J

80.

A 735kg empty roller coaster is at its starting point whose distance from the ground is 150m. After a while, it moves at point B whose distance from the ground is 120m. What is the kinetic energy of the coaster at point B?

a)

1,080,450J

b)

864,360J

c)

216,090J

d)

0J

81.
How do you calculate power?
a)
P = W/t
b)
P = E/t
c)
P = w * t
d)
P = bbq/chicken
82.
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
83.
The energy of movement is...? 
a)
Kinetic
b)
Potential
84.
Energy that is stored is called...
a)
Kinetic
b)
Potential 
85.
What is the formula for Kinetic Energy?
a)
PE = m*g*h
b)
KE = 1/2m*v2
c)
W = F*d
d)
P = W/t
86.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
87.
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
88.
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 
89.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
90.
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 
91.
What is the formula for calculating the total amount of mechanical energy?
a)
ME = KE + PE
b)
KE = ME + PE
c)
PE = KE + ME
d)
ME = 1/2 mv2
92.
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
93.

The product of the net force on an object and the distance through which the object is moved

a)

joule

b)

power

c)

work

d)

energy

94.

The unit for work (aka Newton-meter)

a)

Watt

b)

Power

c)

Work

d)

Joule

95.

________________ is the rate at which work is done.

a)

Power

b)

Work

c)

Time

d)

Energy

96.

The unit of power (aka Joule per second)

a)

Joule

b)

Minute

c)

Watt

d)

Pound

97.

The property of an object or system that allows it to do work is ________________.

a)

Work

b)

Energy

c)

Power

d)

Distance

98.

This theorem states, "Whenever work is done, energy changes.

a)

Work-Energy Theorem

b)

Paul-Newman Theorem

c)

Action-Reaction Theorem

d)

Study-Now Theorem

99.

Energy cannot be ________ or ___________.

a)

big/small

b)

left/right

c)

created/destroyed

d)

made/transferred

100.

Energy can be transformed from one form into another, but the total amount of energy never changes.

a)

Work-energy theorem

b)

Law of conservation of energy

c)

Newton's second law of motion

d)

King's theorem of energy

101.
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
102.
What is g on Earth?
a)
9.8 m/s/s
b)
9.8 m/s
c)
42 m*s
d)
42 m/s/s
103.

What does conservation of energy mean?

a)

Total energy increases

b)

Total energy decreases

c)

Total energy stays the same

104.

If the marble had 6.9 J of (potential) energy at the top of the hill and 5.4 J of (kinetic) energy at the bottom of the hill, was energy conserved and why?

a)

Yes because the total energy stayed the same

b)

Yes because the total energy changed

c)

No because the total energy stayed the same

d)

No because the total energy changed

105.

If the 1.2 kg basketball rolls at 3 m/s, what is it's kinetic energy?

a)

2.7

b)

5.4

c)

3.6

d)

9

106.

The marble had 5.4 J of kinetic energy and then hit the stationary basketball. The basketball started rolling and the marble stopped rolling. The rolling basketball now has 5.4 J of kinetic energy. Was energy conserved and why?

a)

Yes because the total energy stayed the same

b)

Yes because the total energy changed

c)

No because the total energy stayed the same

d)

No because the total energy changed

107.

Suppose a cart has a kinetic energy of 0.5 J. If you add enough mass to double the mass and make the cart go three times as fast, its kinetic energy is now ---.

a)

6 J

b)

3 J

c)

18 J

d)

9 J

108.

Two equal mass marbles are at the top of a ramp. One marble falls to the ground off the back while the other rolls down the ramp. What is true about the marbles when they reach the ground?

a)

The marble that rolled down the ramp is moving faster than the marble that fell.

b)

The marble that fell down the back of the ramp is moving faster than the marble that rolled.

c)

The marble that rolled down the ramp is not moving when it reaches the ground.

d)

The two marbles are moving with the same speed.

109.
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
110.
What is the difference between calculating power and work?
a)
Power takes into account the time it takes to complete a task
b)
Work takes into account the time it takes to complete a task
c)
Power is force/area
d)
Work is force/area
111.

The roller coaster car has a mass of 500 kg. It is pulled from position 1 to 2 (30 m) by a motor. At the top of the ride the vertical distance top to bottom is 20 m. The motor pulls the car with a 4000 N force. Calculate the work done getting the car to the top of the ride.

a)

100 000J

b)

120 000J

c)

800 000J

d)

90 000J

112.

On a force versus change in position graph, the area under the curve is a representation of:

a)

force

b)

position

c)

KE

d)

PE

e)

Work

113.

An 80 N rope tension force is used to slowly pull a wagon 50 m up a hill. Calculate the work done by the rope if it pulls parallel to the hill

a)

-4000 J

b)

4000 J

114.

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?

a)

800 W

b)

700W

c)

4000W

d)

5000W

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