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Worksheets

Revision grade 8

Total questions: 161

Worksheet time: 4hrs 2mins

Name
Class
Date
1.
What is speed?
a)
The rate at which an object changes position
b)
The direction an object is moving
c)
moving fast
d)
change in speed or direction
2.

Mrs. Hill was riding her bike. She travels 20 km. It took her 2 hours. If Mrs. Hill traveled at the same speed, how fast was she traveling?

a)

40 km/hr

b)

10 km/hr

c)

2 km/hr

d)

20 km/hr

3.

Paul swims 220 metres in 110 seconds. Find his speed in m/s.

a)

2m/s

b)

0.5m/s

c)

2km/h

d)

2.2m/s

4.

Paul swims 100 metres in 200 seconds. Find his speed in m/s.

a)

2m/s

b)

0.5m/s

c)

2km/h

d)

2.2m/s

5.

Paul drives for a distance of 600 km in 8 hours. Find his speed.

a)

75 km/h

b)

65 km/h

c)

70 km/h

d)

80 km/h

6.

Paul drives for a distance of 630 km in 9 hours. Find his speed.

a)

75 km/h

b)

65 km/h

c)

70 km/h

d)

80 km/h

7.

When was the object sitting still?

a)

between 5 and 6 seconds

b)

between 2 and 5 seconds

c)

between 1 and 2 seconds

d)

between 0 and 1 second

8.

At what point is the object moving back to the starting point?

(a)  

9.

At what point is the speed the greatest?

a)

C-D

b)

B-C

c)

A-B

d)

D-E

10.

Match the graph to the description:

"The car is slowing down."

a)
b)
c)
d)
11.

What is this graph showing?

a)

Gradually slowing down

b)

Gradually speeding up

c)

Constant speed

d)

Stopped

12.
a)

Accelerating gradually

b)

Stopping

c)

Slowing down constantly

d)

Speeding up constantly

13.

What line has the greatest speed?

a)

Line A

b)

Line B

c)

Both

d)

Neither

14.

What is this graph showing?

a)

Acceleration (Speeding up)

b)

Acceleration (Slowing down)

c)

An object moving at a constant speed

d)

Object at rest

15.

Same distance each second (always the same speed) is what?

a)

Constant Speed

b)

Instantaneous speed

c)

Average Speed

16.

Total distance divided by total time is what?

a)

Constant Speed

b)

Instantaneous speed

c)

Average Speed

17.
Which graph shows: a car slowing down and coming to a stop.
a)
A
b)
B
c)
C
d)
D
18.

What is the acceleration during the first 5 seconds?

a)

2 m/s2

b)

4 m/s2

c)

5 m/s2

d)

10 m/s2

19.

What does s, d and t stand for?

(a)  

20.
A measurement of how fast an object is moving
a)
Velocity
b)
Speed
c)
Vector
d)
Acceleration
21.
What is the speed of an object that travels 20 meters in 4 seconds?
a)
80 m/s
b)
0.2 m/s
c)
5 m/s
d)
24 m/s
22.

What are you calculating when you divide the distance an object travelled by the amount of time it took for that object to travel that distance?

a)

velocity

b)

slope

c)

motion

d)

speed

23.

Distance ÷ Time =

a)

velocity

b)

speed

c)

acceleration

d)

direction

24.

The speedometer in a car gives the car's _________ speed.

a)

average

b)

instantaneous

c)

speed

d)

velocity

25.

total distance travelled divided by total time is...

a)

speed

b)

velocity

c)

acceleration

d)

average speed

26.

The relationship between speed, distance, and time can be written as a(n) ________.

a)

instantaneous speed

b)

slope

c)

equation

d)

velocity

27.

The SI unit for speed is_______.

a)

meters per second

b)

miles per hour

c)

miles per second

d)

meters per hour

28.

speed in a given direction

a)

velocity

b)

average speed

c)

instantaneous speed

d)

speed

29.

The speed at which an object is moving at a given instant in time.

a)

speed

b)

Instantaneous speed

c)

Average speed

d)

final speed

30.

The _______ of a distance-versus-time graph shows you the speed of a moving object.

a)

average

b)

run

c)

rise

d)

slope

31.

What two things do you need to know to calculate velocity?

a)

direction and distance

b)

speed and distance

c)

speed and direction

d)

Distance and time

32.

Static Friction is present only when an object is at rest.

a)

True.

b)

False.

33.

A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50.What is the magnitude of the frictional force that acts on the block?

a)

5 N

b)

8 N

c)

2 N

d)

0 N

34.

Static and kinetic friction can be present simultaneously.

a)

True

b)

False.

35.
What is a friction force acting upon an object on wheels?
a)
Static 
b)
Sliding 
c)
Rolling 
d)
Fluid 
36.
What is a friction force  acting on an NON- moving object.
a)
Static friction 
b)
Fuild friction 
c)
Rolling friction 
d)
Sliding Friction 
37.

The mass of a brick is 5kg, and it is stationary. What is the maximum static friction if the coefficient is 0.66?

a)

3.3

b)

33

c)

3.3N

d)

33N

38.

There are 25N of friction that keep a 10kg brick moving at a constant rate. What is the coefficient of friction?

a)

0.25

b)

0.25N

c)

4

d)

4N

39.

Friction always...

a)

Resists motion

b)

Is negative

c)

Goes against the applied force

d)

Is determined by weight

40.

Kinetic friction is always ... than Static friction

a)

Greater

b)

Lesser

c)

Similar

d)

unrelated

41.
What does friction produce?
a)
light
b)
sound
c)
heat
d)
gravity
42.
The rougher the surface, the faster an object will travel over the surface.
a)
True
b)
False
43.

What is static friction?

a)

the friction between two objects that are not moving

b)

friction between a rolling object and the surface that it is rolling on

c)

friction is friction where an object rubs against another surface

d)

friction of something going through any type of liquid or air

44.
How does friction affect speed?
a)
more friction decreases speed
b)
more friction increases speed
c)
less friction decreases speed
45.
A puck slides along an icy surface. What makes it slow down?
a)
It runs out of push
b)
It rubs against the ice
c)
It runs out of electricity
46.
 What is the force of friction between a block of ice that weighs 950 N and the ground if μ = .12? 
a)
65 N
b)
226 N
c)
175 N
d)
114 N
47.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
48.
The amount of friction depends on the weight of the objects pressing together.
a)
True
b)
False
49.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
50.
Which of the following is an example of friction that is harmful?
a)
Pencil marking on paper
b)
Engine parts wearing out
c)
sand placed on ice in the winter
d)
Using an eraser to erase marks
51.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
52.
How does friction affect speed?
a)
more friction decreases speed
b)
more friction increases speed
c)
less friction decreases speed
d)
less friction doesn't affect speed
53.

without friction, an object in motion would never stop

a)

true

b)

false

54.

you can walk because there is friction between your __________ and ______________

a)

ground and air

b)

feet and ground

c)

feet and air

d)

air and ground

55.

friction helps you write on a paper or black board.

a)

true

b)

false

56.
 What is the unit called that measures force?
a)
weight
b)
meter
c)
Newton
d)
kilogram
57.
What are 2 factors that determine the amount of friction between 2 objects?
a)
Force and roughness between surfaces
b)
hills and valleys and how smooth or rough the surface is
c)
Amount of force and amount of surface the comes in contact
d)
The force and the weight exerted on the surfaces
58.

In which of these examples is friction helpful:

a)

soil erosion

b)

engine parts wearing out

c)

breaks stopping a car

d)

holes developing in your socks

59.

Haley is standing outside in the cold weather waiting for her bus. How can she create heat with her hands?

a)

Wave her hands in the air

b)

Rub her hands together

c)

Cover her hands in a towel

d)

Wash her hands with water

60.

Two objects will create some heat if what is true?

a)

The objects are far apart.

b)

. The objects are both very heavy.

c)

The objects are made of different mate

d)

The objects rub against each other

61.

Right after a nail is pulled from a piece of wood, it feels hot. What makes the heat?

a)

The wood rubs against the nail

b)

The nail is made of iron, a kind of metal.

c)

The nail was heated by the air around it.

d)

The wood is made from a tree, a living thing.

62.

Wesley is bored during class and begins rubbing his pencil eraser on the desk. He notices he created energy. What kind of energy can be created by rubbing an eraser on a desk?

a)

electric energy

b)

heat energy

c)

light energy

d)

magnetic energy

63.

Micah is riding his bike. He stops quickly and notices the tires feel very hot. Why are the tires hot?

a)

They are filled with ai

b)

They moved in a circle.

c)

They are very smooth.

d)

They rubbed against the road.

64.

Which of these actions would most likely make the most heat?

a)

Dragging a heavy box across the floor

b)

Letting ice cubes melt on a plate

c)

Growing plants in a sunny window

d)

Pouring water from one cup to another

65.

Larissa is enjoying a camping trip with her friends and all of their dads. The dads decide to show the girls how to start a fire without the use of a lighter or match. Which of these is the best way to create the heat to start a campfire?

a)

Allowing the sun to shine on a pile of sticks

b)

Rubbing two large sticks together

c)

Blowing warm air onto a pile of sticks

d)

Breaking one long stick into smaller sticks

66.

Adrian has two blocks of wood. What can Adrian do with the blocks so they will make heat?

a)

Place one block on top of the other

b)

Put the blocks under a heavy blanket

c)

Rub one block against the other

d)

Carefully take the temperature of the blocks

67.
According to Newton's second law, if you increase the force applied to an object :
a)
it accelerates more
b)
it doesn't move
c)
you get more inertia
d)
it decelerates
68.
According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
a)
remain in motion.
b)
eventually come to a stop.
c)
change its momentum.
d)
accelerate.
69.
What law?
a)
1st
b)
2nd
c)
3rd
70.
This person bought coffee and put it on the seat next to them. If they stopped quickly and the coffee spilled which law would that represent?
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
71.
A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
72.
In the picture, the vehicle will move because of...
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 9th Law
73.
A car speeding up, a dog slowing down and person turning around the block are examples of..
a)
Balanced Forces
b)
Unbalanced Forces
74.

Which diagram best shows person pushing a couch (accelerating) across the floor?

a)
b)
c)
d)
75.

Which free body diagram is correct for a car being pulled at a constant velocity?

a)

A

b)

B

c)

C

d)

D

e)

E

76.
Calculate the net force acting upon the object.
a)
4 N northwest
b)
11.7 N northwest
c)
46.0 N west
d)
8 N southeast
77.

A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force.

a)

Law 1

b)

Law 2

c)

Law 3

78.

For every action, there is an equal and opposite reaction.

a)

Law 1

b)

Law 2

c)

Law 3

79.

The force acting on an object is equal to the mass of that object time it’s acceleration.

a)

Law 1

b)

Law 2

c)

Law 3

80.

 A person is riding in a car, traveling straight. The car comes to a quick stop and the person’s body leans forward against the seatbelt. 

a)

Law 1

b)

Law 2

c)

Law 3

81.

You kick a bowling ball and a tennis ball with the same amount of force. The tennis ball travels farther than the bowling ball.

a)

Law 1

b)

Law 2

c)

Law 3

82.

A bird flaps its wings down and the air pushes the bird upwards

a)

Law 1

b)

Law 2

c)

Law 3

83.

A swimmer pushes back on the water and moves forward

a)

Law 1

b)

Law 2

c)

Law 3

84.

A picture frame is hanging on a wall and does not move

a)

Law 1

b)

Law 2

c)

Law 3

85.

Which law is nicknamed the law of Inertia?

a)

Law 1

b)

Law 2

c)

Law 3

86.

Which law is nicknamed the law of Action-Reaction?

a)

Law 1

b)

Law 2

c)

Law 3

87.

Which law is nicknamed the Law of Acceleration?

a)

Law 1

b)

Law 2

c)

Law 3

88.

A push or pull that causes an object to move, stop, or change direction.

a)

Acceleration

b)

Velocity

c)

Force

d)

Friction

89.

Increase in the rate or speed of something.

a)

Gravity

b)

Acceleration

90.

A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force.

a)

Law 1

b)

Law 2

c)

Law 3

91.

For every action, there is an equal and opposite reaction.

a)

Law 1

b)

Law 2

c)

Law 3

92.

The force acting on an object is equal to the mass of that object time it’s acceleration.

a)

Law 1

b)

Law 2

c)

Law 3

93.

 A person is riding in a car, traveling straight. The car comes to a quick stop and the person’s body leans forward against the seatbelt. 

a)

Law 1

b)

Law 2

c)

Law 3

94.

You kick a bowling ball and a tennis ball with the same amount of force. The tennis ball travels farther than the bowling ball.

a)

Law 1

b)

Law 2

c)

Law 3

95.

A bird flaps its wings down and the air pushes the bird upwards

a)

Law 1

b)

Law 2

c)

Law 3

96.

A swimmer pushes back on the water and moves forward

a)

Law 1

b)

Law 2

c)

Law 3

97.

A picture frame is hanging on a wall and does not move

a)

Law 1

b)

Law 2

c)

Law 3

98.

Which law is nicknamed the law of Inertia?

a)

Law 1

b)

Law 2

c)

Law 3

99.

Which law is nicknamed the law of Action-Reaction?

a)

Law 1

b)

Law 2

c)

Law 3

100.

Which law is nicknamed the Law of Acceleration?

a)

Law 1

b)

Law 2

c)

Law 3

101.

A push or pull that causes an object to move, stop, or change direction.

a)

Acceleration

b)

Velocity

c)

Force

d)

Friction

102.

Increase in the rate or speed of something.

a)

Gravity

b)

Acceleration

103.

How many Laws of Motion did Isaac Newton Create?

a)

2

b)

4

c)

5

d)

3

104.

In Newton's first Law of Motion, an object at rest will ___________.

a)

defy gravity

b)

want to move

c)

remain at rest

d)

Go to the Moon!

105.

According to Newton's Second Law of Motion, an object in motion will _________.

a)

Stay in motion

b)

want to stop right away

c)

spontaneously combust

d)

Go to the Moon!

106.

Mass of an object can be defined by...

a)

how small an object is

b)

how large an object is

c)

how far an object is from the sun

d)

How much matter an object is made out of.

107.

The greater the mass of an object, the greater the amount of ______ is needed to make it accelerate.

a)

Force

b)

Matter

c)

Acceleration

d)

Velocity

108.

In the equation f=ma, what does the "m" stand for

a)

acceleration

b)

matter

c)

mass

d)

force

109.

If you have a balloon and a bowling ball, which object would need more force to make it move. Explain why. (answer in complete sentences)

4 lines
110.

In the equation f=ma, what unit of measure is used for force?

a)

Kilogram

b)

Newton

c)

Feet per second

d)

Meters per second

111.

According to Newtons Third Law of Motion, every action has an equal and opposite _________.

a)

gravity

b)

force

c)

mass

d)

reaction

112.

In the equation f=ma, "F" stands for _______.

a)

force

b)

mass

c)

velocity

d)

acceleration

113.

Solve the following equation to find the force.

F = 10kg x 5m/s

a)

20 newtons

b)

50 newtons

c)

2 newtons

d)

50 kilometers

114.

Solve the following equation to find the acceleration of the object.

20n = 10kg x a

a)

2 kilometers

b)

200 meters per second

c)

8 meters per second

d)

2 meters per second

115.

Jumping into the air is an example of _________.

a)

Action-reaction forces

b)

Momentum

c)

electromagnetic fields

d)

Mass

116.

Which choice below best defines MOMENTUM?

a)

Gravitational forces pulling an object from earth

b)

How fast an object can speed up

c)

An object at rest wants to stay at rest

d)

Characteristic of moving objects dealing with its mass and velocity

117.

True or False. If an object is hit opposite sides with the same amount of force on each side, the forces cancel out and the object will NOT move.

a)

True

b)

False

118.

What is velocity?

a)

It is only the acceleration of an object

b)

It is the speed AND direction of an object.

c)

Only the direction of an object

d)

None of the above

119.

True or false. If you change ONLY the direction of an object, you have then changed its velocity.

a)

True

b)

False

120.

If you saw a bus and a car slowly rolling down a hill, which object would gain greater momentum? Why?

4 lines
121.

Which choice below best defines gravity?

a)

A force that pushes away

b)

an objects ability to accelerate

c)

An objects mass attracting other objects towards it

d)

The ability to change the speed and direction of an object

122.

Select the term that BEST matches the definition below.

Definition: Energy that causes movement.

a)

Force

b)

Gravity

c)

Momentum

d)

Newton's Third Law of Motion

123.

What force slows objects down and keeps them from moving?

a)

Acceleration

b)

Gravity

c)

Friction

d)

Net Force

124.

Which one of Newton's laws are displayed

a)

2nd law

b)

1st law

c)

3rd law

125.

An object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an outside force. Which law does this describe

a)

2nd law

b)

1st law

c)

3rd law

126.

This is Newton's 3rd law

a)

True

b)

False

127.

When there is a change in motion?

a)

When forces are balanced

b)

When the forces are unbalanced

c)

Whe forces are equal

d)

Never

128.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
129.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
130.
Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?
a)
car
b)
bike
c)
they are equal
d)
cannot determine using the info provided
131.
Momentum is a ____________________ quantity
a)
science
b)
scalar
c)
vector
d)
energy
132.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
133.
When two objects collide, the Pbefore is ____________ the Pafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
134.
What is the unit for mass?
a)
m/sec
b)
kg/sec
c)
kg
d)
kg m/sec
135.
What is the unit for velocity?
a)
m/sec
b)
kg/sec
c)
kg/m
d)
kg m/sec
136.
What is the unit for momentum?
a)
m/sec
b)
kg/sec
c)
kg/m
d)
kg m/sec
137.
A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball. 
a)
55 kg*m/s
b)
100 kg*m/s
c)
250 kg*m/s
d)
500 kg*m/s
138.
What happens to the speed of the wagon as the rain collects inside of it?
a)
it decreases
b)
it remains constant
c)
it increases
139.

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

a)

Skater 1 experiences a greater change in momentum

b)

Skater 2 experiences a greater change in momentum

c)

Skater 1 has a greater speed than Skater 2

d)

Skater 1 experiences a greater force

140.
Parkour Peter bends his knees upon landing in order to ____
a)
reduce his change in momentum
b)
increase his change in momentum
c)
increasing his landing time
d)
increasing his landing force
141.
Both students experience the same ____
a)
force of impact
b)
time of impact
c)
change in momentum
d)
all of the above
142.

Isaac Newton developed these 3 laws concerning ______________.

a)

Velocity.

b)

Mass

c)

Acceleration.

d)

Motion

143.

What explains why objects resist changes in their state of motion?

a)

gravity

b)

inertia

c)

force

d)

friction

144.

What explains a quantity that has BOTH speed and direction?

a)

Inertia

b)

Force

c)

Speed

d)

Velocity

145.

The force that prevents a ball rolling on the ground from continuing on it's path forever is...

a)

Friction

b)

Gravity

c)

Inertia

146.
A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?
a)
For every action there is an equal and opposite reaction.
b)
Every mass exerts a force on every other mass.
c)
An object at rest tends to stay at rest.
d)
Friction opposes the motion of an object.
147.
An empty truck and a fully loaded truck are next to each other at a traffic light. When the light turns green, the lighter truck increases speed more quickly. Which of these best explains this situations
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
d)
Conservation of momentum
148.
The combination of all the forces acting on an object is the...
a)
net force
b)
action force
c)
reaction force
d)
balance force
149.
What two measurements are necessary for calculating speed?
a)
Mass and time
b)
Temperature and mass
c)
Mass and distance
d)
Distance and time
150.
What is the speed of an object that travels 60 meters in 4 seconds?
a)
240 m/s
b)
15 m/s
c)
0.067 m/s
d)
15 mph
151.
A force of 90N is applied to each cart below, which one will accelerate the fastest?
a)
Cart 1
b)
Cart 2
c)
Cart 3 
d)
Cart 4
152.
If a 10 kilogram object had a force of 50 newton's applied to it, what would its acceleration be?
a)
15 m/s^2
b)
5 m/s^2
c)
.5 m/s^2
d)
10 m/s^2
153.

An inflated balloon released from rest moves horizontally.

The law that best explains this event is

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

Law of Gravity

154.

True or False: objects with greater mass require more force to accelerate when compared to objects with less mass.

a)

True

b)

False

155.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
156.

A force is:

a)

a push

b)

a pull

c)

both

d)

neither

157.

Which force causes an object to speed up or slow down (accelerate or decelerate)?

a)
unbalanced force
b)
balanced force
158.

Newton's Second Law is also known as the Law of _______

a)

Inertia

b)

Acceleration

c)

Action - Reaction

d)

Gravitation

159.

Which of the following is the correct position - time graph for an object moving with a constant velocity?

a)
b)
c)
d)
160.

A dictionary weighing 15 Newtons is placed on a desk.

What is the force that the desk exerts on the dictionary?

a)

none

b)

15 N

c)

1.5 N

d)

150 N

161.

Isaac Newton stated for every action there is an

_________ and _________ reaction.

a)

equal and same

b)

equal and opposite

c)

unequal and same

d)

unequal and opposite

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