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Unit 3 Energy and Forces

Total questions: 101

Worksheet time: 1hrs 27mins

Name
Class
Date
1.
What is the value of g on Earth?
a)
9.81 m/s^2
b)
9.81 N
c)
9.81 m
d)
9.81 s/m^2
2.
When plants convert the sun's energy into food, which type of energy is it?
a)
kinetic
b)
chemical
c)
thermal
d)
radiant
3.
Both of these are measured in Newtons
a)
Force and acceleration
b)
Force and weight
c)
Mass and weight
d)
Mass and acceleration
4.
What is the SI unit used to measure weight?
a)
Grams 
b)
Liters
c)
Pounds 
d)
Newtons 
5.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
6.
Which of the following is a unit of energy?
a)
Kilowatts
b)
Grams
c)
Meters per Second
d)
Joules
7.
How much work is produced when 350 N is used to move a car 5 m?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
8.
What is the unit for mass?
a)
m/sec
b)
kg/sec
c)
kg
d)
kg m/sec
9.
The force of gravity will _____________as objects become farther apart.
a)
decrease
b)
increase
10.
When forces are acting on an object and it produces a net force of 0, you can say that the forces are _______________.
a)
balanced
b)
unbalanced
11.
Two factors that affect the rate of gravity are ____________.
a)
distance and mass
b)
weight and resistance
c)
location and speed
d)
position and friction
12.
Stored energy is called ______________.
a)
potential energy
b)
kinetic energy
13.
Force is measured in _____________.
a)
pounds
b)
newtons
c)
grams
d)
meters
14.

Every moving object has kinetic energy. This illustration shows four vehicles. Assume that they are all traveling at the same speed on a highway.What do you know about the kinetic energy of the vehicles?

a)

The motorcycle has the most kinetic energy because it is the vehicle with the least mass.

b)

All of the vehicles have the same kinetic energy because they are moving at the same speed.

c)

The delivery van has the greatest kinetic energy because its mass is greater than that of the other vehicles

d)

The delivery van has the greatest kinetic energy because it has the most tires in contact with the pavement.

15.

Which is kinetic energy?

a)

energy that is increasing

b)

energy that is decreasing

c)

the energy of a moving object

d)

energy that is stored in the position of an object

16.

True or False: The law of conservation of energy states that energy cannot be created or destroyed.

a)

True

b)

False

17.

True or False: A force is the ability to do work.

a)

True

b)

False

18.

Which best describes the type of energy that a skateboard has when it travels on a flat sidewalk?

a)

kinetic energy

b)

potential energy

19.

The amount of kinetic energy an object has is related to its mass and ....

a)

height

b)

speed

c)

weight

d)

shape

20.

An object in motion will not stop until it is acted upon by

a)

a balanced force

b)

an unbalanced force

21.

If two tigers pull on a rope with equal force, the rope does not move. This is an example of...

a)

friction

b)

balanced forces

c)

acceleration

d)

unbalanced forces

22.

True or False: When an elevator is accelerating upward in a building, there are unbalanced forces acting on it.

a)

True

b)

False

23.

The ability to do work is

a)

force

b)

energy

c)

acceleration

d)

inertia

24.

The more friction between colliding objects, the ..... heat produced during a collision.

a)

more

b)

less

25.

Which force will stop a moving car?

a)

friction

b)

inertia

c)

newtons

d)

balanced forces

26.

Energy transfer is the movement of energy from one object to another. Which is NOT an example of kinetic energy being transferred between objects?

a)

Baseball bat hitting a baseball

b)

A moving car colliding with a stationary car

c)

Newton's cradle

d)

A pillow at rest on a couch

27.

Which has the most kinetic energy?

a)

a wagon moving at 2 meters/second

b)

a wagon moving at 4 meters/second

c)

a wagon moving at 6 meters/second

d)

a wagon moving at 8 meters/second

28.

True or False: A rollercoaster gain both potential energy and kinetic energy at the same time.

a)

True

b)

False

29.
What kind of energy does this give off?
a)
light energy
b)
sound energy
c)
heat energy
d)
electrical energy
30.
What can you do to make this wagon move?
a)
add more newspapers
b)
put marbles in the wagon
c)
get into the wagon
d)
pull on the wagon
31.
 Why is the cloth in the middle not moving?
a)
Force A is stronger
b)
Force B is stronger
c)
Force A and Force B are the same direction
d)
Force A is equal to Force B
32.
What kind of energy does this roller coaster car have because it is in motion?
a)
chemical energy
b)
light energy
c)
mechanical energy
d)
electrical energy
33.
What force is acting upward on the girl?
a)
friction
b)
her weight
c)
gravity
d)
her seat
34.
 What type of energy does this give off?
a)
only light
b)
only heat
c)
only electrical 
d)
both light and heat
35.
What is the reason the car travels down the ramp?
a)
the ramp is magnetic
b)
the car has wheels
c)
the force of gravity pulls the car
d)
the car is a very weak magnet
36.

When the net force on an object is NOT zero N, the forces are...

a)

balanced

b)

unbalanced

37.

When the net force on an object is zero N, the forces are...

a)

balanced

b)

unbalanced

38.

Which of the following are examples of contact forces? (Select all that apply.)

a)

Gravity

b)

Friction

c)

Air Resistance

d)

Kicking a ball

39.

Unbalanced forces mean that an object's motion...

a)

WILL change.

b)

will NOT change.

40.

Which of the following are examples of non-contact forces? (Select all that apply.)

a)

Gravity

b)

Friction

c)

Air Resistance

d)

Magnetic Force

41.

If Miss McCarthy is playing tug-o-war with her sister, and each of them pulls on the rope with 20 N of force, then...

a)

the net force is 40 N and the forces are balanced.

b)

the net force is 40 N and the forces are unbalanced.

c)

the net force is 0 N and the forces are balanced.

d)

the net force is 0 N and the forces are unbalanced.

42.

Friction and air resistance always exert force...

a)

in the same direction as the object's motion.

b)

in the opposite direction of the object's motion.

43.

What is the difference between mass and weight?

a)

Nothing. They are the same.

b)

Mass is how much "stuff" something is made of, and weight is how much gravity pulls on that "stuff".

c)

Weight is how much "stuff" something is made of, and mass is how much gravity pulls on that "stuff".

d)

Mass is how heavy something is, and weight is how much "stuff" something is made of.

44.
Looking at the roller coaster, were does the cart have the most potential energy?
a)
A
b)
B
c)
C
d)
D
45.
If William pushes a 75N sofa up a ramp that is 5 meters long, what is the amount of work that William does?
a)
400 Joules
b)
350 Joules
c)
3 Newtons
d)
375 Joules
46.
When a kid eats an apple and then uses the energy to go outside and play, the kid's body converts what kind of-
a)
Electrical to Chemical 
b)
Chemical to Mechanical
c)
Mechanical to Chemical 
d)
Light to Sound
47.
Which is an example of potential energy?
a)
A girl on a diving board
b)
A boy swimming
c)
A girl hitting a volleyball
d)
A boy running around the pool
48.
The rocket ship uses giant gas tanks to take off into outer space. What is the progression of the 3 energy transformation?
a)
Electrical - Light - Mechanical
b)
Mechanical - Thermal - Chemical 
c)
Chemical - Thermal - Mechanical
49.
What is the net force shown in the diagram?
a)
50N right
b)
950N
c)
50N left
d)
150N left
50.

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. Which question is this investigation most likely designed to answer? (5.6D)

a)

How do block of different sizes react to force?

b)

How do different surfaces affect the amount of force needed to move a block?

c)

How do blocks affect spring scales?

d)

How does the mass of a block change when it is pulled across a desk?

51.
Which experiment listed below will best determine how friction affects the speed of a rolling object?
a)
Roll 3 objects of various sizes across the floor.
b)
Roll 3 objects of equal size from various heights across the floor.
c)
Roll 3 objects of equal size across 3 different types of surfaces.
d)
Roll 3 objects of equal size from equal heights across the floor.
52.
Which word describes a push or pull on an object?
a)
Position
b)
Hypothesis
c)
Mass
d)
Force
53.
A polar bear slides down an ice covered hill. As he slides, he slows down. Eventually he comes to a stop. What force  acts on an object to slow or stop its motion?
a)
Speed
b)
Friction
c)
Gravity
d)
Direction
54.
A student drops a ball from shoulder height. The ball bounces 5 times before coming to a stop. What force causes the ball to fall to the ground?
a)
Friction
b)
Magnetism
c)
Position
d)
Gravity
55.
Looking at the picture, what two tools would be needed to measure the effect of friction on the ball?
a)
Hand lens and balance
b)
Balance and spring scale
c)
Measuring tape and stop watch
d)
Spring scale and hand lens
56.
A boy applies a pushing force on a ball thrown into the air. What applies a pulling force on the ball at the same time?
a)
Gravity
b)
The height of the boy
c)
Friction
d)
The mass of the ball
57.

When a ball is kicked, ______________ causes the ball to change location.

a)

position

b)

movement

c)

gravity

d)

friction

58.

What kind of energy gets STORED inside a parked car on a hot, sunny day?

a)

Mechanical energy

b)

Light energy

c)

Sound energy

d)

Thermal energy

59.

All of the following produce light energy, except...

a)

a candle.

b)

a flashlight.

c)

a television.

d)

the moon.

60.

Energy causes change and creates movement.

a)

True

b)

False

61.

What form of energy is used when you sharpen your pencil?

a)

Heat

b)

Mechanical

c)

Light

d)

Sound

62.

Which source of energy is used to grill a steak?

a)

mechanical energy

b)

sound energy

c)

thermal energy

d)

light energy

63.

What two forms of energy does the sun provide?

a)

thermal and light

b)

sound and mechanical

c)

mechanical and light

d)

thermal and sound

64.
What kind of energy is in a moving skateboard?
a)
Potential
b)
Kinetic
65.
Is this a balanced or unbalance force?
a)
Balanced
b)
Unbalanced
c)
Neither one
d)
Both
66.
Calculate the net force of the object in the image shown.
a)
20N
b)
35N
c)
5N
d)
25N
67.
Which direction will the object move?
a)
Up
b)
Down
c)
Right
d)
Left
68.
What is the net force?
a)
65 N left
b)
65 N right
c)
35 N left
d)
35 N right
69.
What is the standard unit force is measured in?
a)
Newtons
b)
pounds
c)
grams
d)
meters
70.
What is the net force?
a)
11 N left
b)
11 N right
c)
3 N left
d)
3 N right
71.
If there are two forces going in the same direction how would you find the net force?
a)
Subtract
b)
Add
c)
Neither
d)
Multiply
72.
What is the magnitude (size) and direction of the net force?
a)
15 N to the left
b)
15 N to the right
c)
1 N to the left
d)
1 N to the right
73.
What is the magnitude (size) and direction of the net force?
a)
14 N Down
b)
14 N Up
c)
6 N Up
d)
6 N Down
74.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
75.
What is the magnitude (size) and direction of the net force?
a)
5 N to the Right
b)
5 N to the Left
c)
10 N to the Right
d)
4 N to the Left
76.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
77.
What kind of energy is in a rock at the edge of a cliff?
a)
Potential
b)
Kinetic
78.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
79.
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 
80.
What would have the greatest kinetic energy?
a)
A car driving down a hill.
b)
A person running down a hill. 
c)
A ball rolling down a hill. 
d)
leaves rolling down a hill 
81.
Which is an example of potential energy?
a)
a roller coaster speeding down a hill
b)
the pulled back string on an archers's bow
c)
releasing the strings on a guitar
d)
an electric current lighting a light bulb
82.

The neighbor's cat ran through your yard. The cat has a mass of 1 kg. He is running at a speed of 2 m/s. What is the kinetic energy of the cat as he runs? KE=1/2 (m)(v^2)

a)

4 J

b)

3 J

c)

1 J

d)

2 J

83.

What energy conversion happens when a roller coaster car moves DOWN a hill?

a)

Kinetic energy is converted to potential energy.

b)

Potential energy is converted to kinetic energy.

c)

Friction energy slows it down.

d)

Thermal energy is converted to solar energy.

84.
Which of the following is a unit of energy?
a)
Kilowatts
b)
Grams
c)
Meters per Second
d)
Joules
85.

A cooking smoker, used to cook meats, works by allowing the warm air filled with smoke to rise to the meat, while the cooler air sinks closer to the fire. What type of heat transfer is responsible for smoking the meat?

a)

Electrical

b)

Radiation

c)

Convection

d)

Conduction

86.

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

a)

The chemical energy stored in the match changed to thermal energy and light energy.

b)

The thermal energy stored in the match changed to light energy and chemical energy.

c)

The light energy and thermal energy stored in the match changed to mechanical energy.

d)

The light energy and thermal energy stored in the match changed to chemical energy.

87.

What transfer of heat is responsible for cooking the chicken?

a)

radiation

b)

convection

c)

electrical

d)

conduction

88.

Which of these actions, on their own, will cause ice to change to water? Remember, hot --- > cold

a)

removing heat from the ice

b)

adding sand to the ice

c)

crushing the ice

d)

adding heat to the ice

89.
What is energy?
a)
the ability to cause change
b)
the ability to resist change
c)
the ability to lack change
d)
the ability to 
90.
"Energy can be transformed from one form into another or transformed from one region or another, but energy cannot be created or destroyed."
Which law is this?
a)
Law of Conservation of Mass
b)
Newton's Second Law
c)
Law of Conservation of Energy
d)
Newton's Third Law
91.
You have just turned on a fan.
What type of energy is this?
a)
Electric
b)
Radiant
c)
Nuclear
d)
Thermal
92.
Thermal energy is...
a)
burning logs
b)
turning on a fan
c)
sun energy
d)
splitting of nuclei
93.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
94.
What energy transformations take place when a battery-operated radio is in use?
a)
Electrical to chemical to light
b)
Sound to chemical to mechanical
c)
Chemical to electrical to sound
d)
Light to electrical to thermal
95.
Energy transformations occur when...
a)
energy is created through conduction
b)
energy changes from one form to another
c)
two forces slide together that are touching
d)
a chemical reaction takes place
96.
In energy transformations, "wasted energy" usually takes what form?
a)
heat
b)
chemical energy
c)
light
d)
sound waves
97.
On a roller coaster, where is maximum kinetic energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
98.
What is produced during ALL energy transformations?
a)
Sound Energy
b)
Mechanical Energy
c)
Thermal Energy
d)
Chemical Energy
99.
Which items would have this energy transformation: chemical energy -> mechanical and thermal energy?
a)
digesting an apple
b)
turning on a flashlight
c)
iron for your clothes
d)
a person running
100.
Mechanical energy
a)
energy built up before being in motion
b)
energy released in a chemical reaction
c)
energy of motion
d)
sum of kinetic and potential energy
101.

A 4 kg ball sits at the top of a ramp 5m high. Find the PE of the ball at the bottom of the ramp.

a)

200 Watts

b)

50 Joules

c)

50 m/s

d)

200 Joules

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