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8th Grade Semester Final Fall 2021

Total questions: 64

Worksheet time: 1hrs 17mins

Name
Class
Date
1.

What two variables effect momentum?

a)

mass

b)

weight

c)

height

d)

Velocity

2.

An Elephant is running at a velocity of 14 m/s. He has a mass of 6,300 kg. What is the elephants momentum? If this quizizz is paper write units if taking on computer don't label your answer.

(a)  

3.

What is the equation for momementum?

a)

p=m×vp=m\times v

b)

p=m×ap=m\times a

c)

p=f÷ap=f\div a

d)

m=p×vm=p\times v

4.

If an object has a big mass, how will that effect it's momentum?

a)

Make it smaller

b)

It has no effect

c)

Make it bigger

5.

If an object is moving very slowly how does that effect it's momentum?

a)

Makes it larger

b)

Makes it the same

c)

Makes it smaller

6.

Which of the following has the MOST momentum? (they are all rolling at the same velocity)

a)

rolling ping-pong ball

b)

rolling bowling ball

c)

rolling soccer ball

d)

rolling basketball

7.

If an object has a momentum of 40 kg x m/s and a mass of 60 kg, what is it's velocity?

a)

2400 m/s

b)

1.5 m/s

c)

240 m/s

d)

.67 m/s

8.

In order for an object to have momentum it must be ________

a)

moving

b)

motionless

c)

alive

d)

asleep

9.

Find the momentum of a 3.0 kg mass when it is stopped.

a)

0 kg*m/s

b)

need to know the velocity

c)

3.0 kg*m/s

d)

9.8 kg * m/s

10.
Which of the following correctly explains why less force is required to stop a person using an airbag?
a)
hitting the airbag decreases the person's momentum
b)
the airbag changes the person's momentum over a longer time interval
c)
the airbag is very soft, like a pillow
d)
decreasing the time of the impact decreases the force of the impact
11.
When two objects collide, the Momentumbefore is ____________ the Momentumafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
12.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
13.

Calculate the Acceleration if the speed boats speed increased from 0m/s to 24m/s in a time span of 12 seconds.

a)

4 m/s²

b)

2 m/s²

c)

8 m/s²

d)

6 m/s²

14.

Calculate the Acceleration if a motorcycle rider increases his speed from 25 m/s to to 55 m/s in 10 seconds

a)

2.5 m/s²

b)

4 m/s²

c)

3 m/s

d)

3 m/s²

15.
A rolling soccer ball decelerated from 22 m/s to 8 m/s in 12 sec.
a)
-1.17 m/s²
b)
.5 m/s²
c)
1.17 m/s²
d)
2 m/s²
16.
Why does a car accelerate as it round a corner at a constant speed?
a)
Its direction changes
b)
It doesn't
c)
It slows down
d)
Its speeds up  
17.
In each of the following cases, determine where the car has no acceleration ?
a)
A car shortly after a stoplight turns green.
b)
A car approaching a red light
c)
A car with the cruise control set at 80 km/h
d)
A car turning a curve at a constant speed
18.
Acceleration: is the rate of change in ___________.
a)
speed
b)
distance
c)
velocity 
d)
displacement 
19.
When are you undergoing an acceleration in a car? 
a)
speed up
b)
slow down
c)
make turns
d)
All of the above 
20.

A change in position or location.

a)

Force

b)

Movement

c)

Direction

d)

Position

21.

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

a)

Force

b)

Movement

c)

Direction

d)

Position

22.

The force that causes objects with mass to attract one another.

a)

Gravity

b)

Magnetism

c)

Friction

d)

Position

23.

A force that resists the motion of two surfaces sliding across one another

a)

Gravity

b)

Magnetism

c)

Friction

d)

Position

24.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
25.
What is the net force?
a)
5 N
b)
45 N to the left
c)
5 N to the right
d)
45 N to the right
26.
If there are two forces going in the SAME direction, you would ...?
a)
(-) Subtract the forces
b)
(+) Add the forces
c)
Neither
d)
(x) Multiply
27.

What is the Net Force and the direction of the object's movement as a result of the net force?

a)

5N, Right

b)

5N, Left

c)

9N, Right

d)

9N, Left

28.

What is the Net Force and the direction of the object's movement as a result of the net force?

a)

11N, Right

b)

11N, Left

c)

1N, Left

d)

1N, Right

29.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
30.

If there are two forces going in the opposite direction how would you find the net force?

a)

Subtract

b)

Add

c)

Neither

d)

Multiply

31.
For every action, thereʼs an equal and opposite reaction. *Action-Reaction*
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
d)
force
32.

An object at rest will stay at rest and an object in motion will stay in motion unless acted on by a force, is which one of Newton's Laws of Motion?

a)

4th Law of Motion

b)

1st Law of Motion

c)

3rd Law of Motion

d)

2nd Law of Motion

33.
What is Newtons 2nd law of motion?
a)
Pancakes 
b)
Force= Mass multiplied by acceleration
c)
For every action there is a equal and opposite  re-action.
d)
Law of gravity 
34.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
35.
Which of Newton's Laws gives the reason for why you can feel things that you touch?
a)
First law
b)
Second law
c)
Third law
36.
Which best explains why we are able to accelerate forward when starting to run?
a)
The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.
b)
As one leg moves backwards, it provides an equal and opposite force for the other for the other foot to move forward. 
c)
No acceleration takes place; runners are always at a fixed velocity. 
d)
The foot not touching the ground propels the entire body forward. 
37.

You hit a wall with a stick. The equal but opposite reaction is _____

a)

the wall pushes against you

b)

the stick pushes against you

c)

the wall pushes against the stick

d)

you push against the stick

38.
A bus hits a bug and the bug splatters on the windshield, which force is greater?
a)
The Bus
b)
The Bug
c)
They're the same
d)
Gravity acting on the bus
39.
The momentum of a rockets fuel going back equals the momentum of the rocket going...
a)
Sideways
b)
Middle
c)
Foward
d)
Left
40.
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.
41.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
zero net force
c)
balanced forces
d)
unbalanced forces
42.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
43.

What is inertia?

a)

the force that opposes motion

b)

the force of attraction between 2 objects

c)

an object's tendency to resist change in motion

d)

a change in an object's speed and/or direction

44.
A large truck is traveling down the highway. How does Mass affect inertia?  
More mass = ?
a)
More inertia
b)
Less inertia
c)
The same inertia
d)
No inertia
45.
According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?
a)
The total amount of energy is conserved
b)
The total amount of energy is less after a reaction
c)
The total amount of energy is more after a reaction
46.
Why does a book on a table not move?
a)
No forces are acting on the book
b)
Gravity is the only force acting on the book
c)
The forces of the table pushing up and gravity pulling down are balanced
47.

Your car has a mass of 2500 kg and a force of 5000 N. How fast will it accelerate?

a)

20 m/s2

b)

0.5 m/s2

c)

2 m/s2

d)

120 N

48.

If the man pushes with an equal amount of force, which object will accelerate more?

a)

Car because it has more mass

b)

Lawnmower because it has less mass

c)

Car because it has less mass

d)

Lawnmower because it has more mass

49.

If an object was accelerating at 5 m/s2, and a force of 10 newtons was required to accelerate it, what was the object's mass?

a)

50 kg

b)

2 kg

c)

0.5 kg

d)

5 kg

50.
When mass is 10 kg, acceleration is 2 m/s/s, what is force?
F = ma
a)
5 N
b)
20 N
c)
8 N
d)
12 N
51.
The larger the mass you have the _____ force you need to change its motion.
a)
more
b)
less
52.
As force applied to a textbook increases, what happens to its acceleration?
a)
Stays the same
b)
Increases
c)
Decreases
d)
Opens
53.

Mrs. Bearden drives 50 miles. What does Mrs. Bearden need to figure out her speed?

a)

The type of car she drives

b)

Her heart rate as she drives

c)

The time she has driven

d)

The direction she was going

54.
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
55.

How far does a lorry move if it is travelling at 12m/s for 180s?

a)

2160 m

b)

0.06 m

c)

15 m

d)

21.6 m

56.

How long does it take a car to travel 40m at 12m/s?

a)

4.8 s

b)

480 s

c)

3.33 s

d)

33.3 s

57.
Which graph represents the greatest acceleration?
a)
A
b)
B
c)
C
d)
D
58.

Match the description to the graph:

"The car is stopped."

a)
b)
c)
d)
59.

Match the description to the graph:

"The car is traveling at a constant speed."

a)
b)
c)
d)
60.

Match the description to the graph:

"The speed of the car is decreasing."

a)
b)
c)
d)
61.
What kind of acceleration is shown here?
a)
positive
b)
negative
c)
none
d)
varies
62.

The graph depicts what type of motion?

a)

Rest

b)

Constant Velocity

c)

Speeding up

d)

Slowing down

63.

The graph depicts what type of motion?

a)

Rest

b)

Constant Velocity

c)

Speeding up

d)

Slowing down

64.
Which section of the graph shows decreasing velocity?
a)
CD
b)
DE
c)
EF
d)
GH

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