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Newton's Third Law Test Review

Total questions: 47

Worksheet time: 1hrs 2mins

Name
Class
Date
1.
Newton's Third Law States...
a)
Objects in motion stay in motion and objects at rest stay at rest
b)
Force is equal to mass times acceleration
c)
For each action there is an equal and opposite reaction
2.
An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...
a)
Air resistance against the bow
b)
the arrow's push against the bowstring
c)
the grip of the archer's hand on the bow
3.
A player throws a ball. The action force is the player impact on the ball. The reaction force is...
a)
The force of the ball impact on the player
b)
The force of the grip of the ball
c)
The celebration the player is thinking of
4.
A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction force is...
a)
The grip of the player's hands on the ball
b)
the air resistance of the ball
c)
the force of the ball against the bat
5.
A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force (without any additional forces action on it) against the bat of...
a)
Less than 1, 000 N
b)
1,000 N
c)
More than 1,000 N
6.
According to Newton's Third law the strength or magnitude of forces will be...
a)
smaller
b)
equal
c)
larger
7.
According to Newton's third law forces come in pairs?
a)
True
b)
False
8.
Which law explains how rockets are launched into space?
a)
Newton's First Law of Motion
b)
Newton's Second Law of Motion
c)
Newton's Third Law of Motion
d)
Newton's Fourth Law of Motion
9.

Force always come in________

a)

waves

b)

triplets

c)

pairs

10.

When a heavy football player and a light one run into each other, who exerts more force? (pushes harder)

a)

The light one

b)

They exert the same force on each other

c)

The heavy one

11.
What Unit do we Measure Force in? 
a)
Newtons
b)
Joules
c)
Force
d)
Kilograms
12.

A baseball player hits a ball with 400 N of force. How much force does the ball exert on the bat?

a)

300 N

b)

400 N

c)

500 N

d)

Not enough info to tell

13.

Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object.

a)

Always true

b)

Sometimes true

c)

Never true

14.

An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is

a)

larger.

b)

the same.

c)

smaller

d)

need more information to say.

15.

A large truck and a small car traveling at the same speed have a head-on collision. The vehicle to undergo the greater change in velocity will be

a)

the small car

b)

the large truck

c)

neither, both are the same.

16.

Earth pulls on the moon, and similarly the moon pulls on Earth. This is evidence that the

a)

Earth and moon are simply pulling on each other.

b)

Earth's and moon's pulls comprise an action-reaction pair.

c)

both a and b

d)

neither a or b

17.
Most modern vehicles have padded dashboards. This reduces collision injuries by...
a)
reducing the driver's change in momentum
b)
increasing the driver's change in momentum
c)
increasing the force of impact
d)
increasing the time of impact
18.

In an elastic collision, ______ is conserved.

a)

Momentum only

b)

Kinetic Energy only

c)

Both momentum and energy

19.
In a perfectly inelastic collision, ______ is conserved. 
a)
Momentum only
b)
Kinetic Energy only
c)
Both momentum and kinetic energy
20.
The recoil speed of a rifle is much less than the exit velocity of a bullet because...
a)
the rifle experiences a smaller force
b)
the rifle experiences a smaller change in momentum
c)
the rifle has a much greater mass
d)
the rifle does not obey the laws of physics
21.
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
22.

If an object has a momentum of 40 kgm/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

23.

Which is the most important factor in an object's momentum?

(2 answers)

a)

shape

b)

mass

c)

velocity

d)

volume

24.

If an object has a velocity of 15 m/s and a momentum of 30 m/s, what is its mass?

a)

450 m/s

b)

2 m/s

c)

4,500 m/s

d)

.5 m/s

25.

If an object has a mass of 20 kg and a velocity of 4 m/s, what is the momentum of the object?

a)

80 kgm/s

b)

4 kgm/s

c)

5 kgm/s

d)

.2 kgm/s

26.
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
27.
Determine the momentum of 1000-kg car moving northward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s
d)
20000 kg * m/s north
28.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
29.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
30.
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
31.
The law of conservation of momentum states that, 
a)
p before is less than p after
b)
p before is the same as p after
c)
p before is more than p after
32.
What makes it possible to determine the motion of objects before or after colliding?
a)
Conservation of Energy
b)
Conservation of Strength
c)
Conservation of Momentum
d)
Conservation of Homework
33.
Collisions can be ____________or ___________.
a)
fast or slow
b)
far or near
c)
elastic or inelastic
d)
none of the above
34.
The total momentum before a collision is _________ the total momentum after a collision. (conservation of momentum)
a)
equal to 
b)
less than 
c)
more than
d)
It depends on the type of collision
35.
What is the the total momentum of the red and blue ball before the collision?
a)
16 kg m/s
b)
32 kg m/s
c)
2 kg m/s
d)
6 kg m/s
36.

2 balls collide and bounce off of each other. During the collision total momentum remained constant and total kinetic energy remained constant. What type of collision is this?

a)

Inelastic Collision

b)

Elastic Collision

c)

Perfectly Inelastic Collision

d)

No collision occurred

37.
If two objects have the same mass, then the faster moving object has ____________ momentum.
a)
more 
b)
less
c)
the same
38.
Jorge noticed a collision outside the coffee shop where two cars collided and stuck together.  What type of collision did he observe?
a)
Elastic
b)
Inelastic
c)
Completely inelastic
d)
none
39.
While playing pool, Emma notices that the pool balls bounce apart.  What type of collision is this?
a)
Elastic
b)
Inelastic
c)
Explosive
d)
Force
40.
Momentum is often referred to as "__________ in motion."
a)
Inertia
b)
Matter
c)
Volume
d)
Force
41.
To change the momentum of an object, a/an _________________ must be applied.
a)
Impulse
b)
Force
42.
The impulse acting on an object is always equal to its change in _____.
a)
Momentum
b)
Energy
c)
Position
d)
Velocity
43.

Impulse is represent by which symbol?

a)

I

b)

J

c)

P

d)

Imp.

44.

What is the unit of impulse?

a)

N/s

b)

Kg.m/s

c)

N.s

d)

None of the above

45.

A baseball bat applies a force of 500 N to a ball for 0.1s. What was the impulse on the ball?

a)

5 N . s

b)

500 N .s

c)

500 N/s

d)

50 N.s

46.

The impulse is _____the change in momentum

a)

Greater than

b)

Equal to

c)

Less than

d)

Always double

47.

A car crashes into a wall with an impulse of 40,000 kg.m/s. The collision took 2 seconds . How much force did the wall exert?

a)

60,000 N

b)

40,000 N

c)

20,000 N

d)

80,000 N

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