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Momentum Practice

Total questions: 56

Worksheet time: 51mins

Name
Class
Date
1.

What are the units for momentum?

a)

J

b)

m/s

c)

kg-m/s

d)

N

2.

What is the units for kinetic energy?

a)

J

b)

m/s

c)

kg-m/s

d)

N

3.

What are the units for impulse?

a)

J

b)

m/s

c)

N

d)

N-s

4.

In which of the following is the momentum of the system conserved?

a)

Only elastic collision

b)

Only Inelastic collision

c)

Both elastic and inelastic collisions

5.

Select the type of collision where kinetic energy is conserved.

a)

Perfectly elastic

b)

Inelastic collision

c)

Explosions

d)

None of the above

6.

A car crashes into a wall and comes to a complete stop. How could the force experienced by the passengers be decreased?

a)

Decreasing the time it takes the car to come to a complete stop

b)

Increasing the time it takes for the car to come to a complete stop

7.

A 4 kg ball is moving at 1 m/s. It then experiences an impulse of - 5 N-s.


What is the final momentum of the system?

a)

4 kg-m/s

b)

-4 kg-m/s

c)

1 kg-m/s

d)

-1 kg-m/s

8.

A 4 kg ball is moving at 1 m/s. It then experiences an impulse of - 5 N-s.


What is the final velocity of the 4 kg ball?

a)

1 m/s

b)

-1 m/s

c)

-0.25 m/s

d)

0.25 m/s

9.

Impulse is ______ the change in momentum

a)

greater than

b)

equal to

c)

less than

d)

always double

10.
A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass?
a)
6030 kg
b)
0.0134 kg
c)
74.4 kg
d)
80 kg
11.

A 5 N force is applied to a 3 kg ball to slow it down from 9 m/s to 3 m/s. What is the impulse on the ball?

a)

-2.5 N⋅s

b)

-10 N⋅s

c)

-18 N⋅s

d)

-45 N⋅s

12.

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s. Calculate the impulse on the ball.

a)

1 N⋅s

b)

6 N⋅s

c)

33.3 N⋅s

13.
The impulse-momentum theorem states that
a)
the impulse on an object is equal to the change in momentum it causes 
b)
the force on a moving object is equal to the magnitude of the impulse.
c)
the impulse on an object is greater than the change in momentum it causes 
d)
the impulse on an object is less than the change in momentum it causes
14.
In this type of collision, objects tend to "stick" together.
a)
elastic
b)
inelastic 
c)
They "stick" together in both types of collisions
15.

In an elastic collision, ______ is conserved.

a)

Momentum only

b)

Kinetic Energy only

c)

Both momentum and energy

16.
In a perfectly inelastic collision, ______ is conserved. 
a)
Momentum only
b)
Kinetic Energy only
c)
Both momentum and kinetic energy
17.
Which object listed below has the greatest momentum?
a)
A 0.05 kg object rolling at 0.2 m/s.
b)
A 0.15 kg object rolling at 2 m/s.
c)
A 0.15 kg object rolling at 1 m/s
d)
A 0.4 kg object rolling at 2 m/s.
18.
In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.
a)
0.5 m/s
b)
1.0 m/s
c)
0.33 m/s
d)
0.67 m/s
19.

A 0.25kg red ball strikes a 1.25kg yellow ball at rest.

After the collision, the 0.25kg red ball is moving with a velocity of -18m/s and the yellow ball is moving with a velocity of +9m/s. What is the initial velocity of the first ball?

a)

63 m/s

b)

28 m/s

c)

103 m/s

d)

44 m/s

20.

A 5kg ball has a momentum of 30 kg*m/s. What is the speed of the ball

a)

150 m/s

b)

35 m/s

c)

6 m/s

d)

5 m/s

21.

Momentum is based on which of the two values below? Select all that apply.

a)

weight

b)

mass

c)

acceleration

d)

velocity

22.

As the velocity an object is travelling at increases, the momentum of the object _______________.

a)

increases

b)

decreases

c)

does not change

d)

not enough information to answer the question

23.

As the mass of an object decreases, the amount of momentum the object has ________________.

a)

increases

b)

decreases

c)

stays the same

d)

Not enough information to answer the question

24.

What is the momentum of the object in the image?

a)

8 kg⋅ms\frac{kg\cdot m}{s}

b)

53 kg⋅ms\frac{5}{3}\ \frac{kg\cdot m}{s}

c)

15 kg⋅ms15\ \frac{kg\cdot m}{s}

d)

−15 kg⋅ms-15\ \frac{kg\cdot m}{s}

25.

What is the correct unit for impulse?

a)

N⋅sN\cdot s

b)

kg⋅ms\frac{kg\cdot m}{s}

c)

Newton

d)

Ns\frac{N}{s}

26.

What is the total momentum of the system shown in the picture?

a)

15 kg⋅ms\frac{kg\cdot m}{s}

b)

−15 kg⋅ms-15\ \frac{kg\cdot m}{s}

c)

30 kg⋅ms30\ \frac{kg\cdot m}{s}

d)

0 kg⋅ms0\ \frac{kg\cdot m}{s}

27.

True or False? Momentum is a vector.

a)

true

b)

false

28.

A 4 kg ball experiences a 10 N force acting for 2 sec. The impulse on the ball is

a)

5 kg•m/s

b)

8 kg•m/s

c)

20 kg•m/s

d)

40 kg•m/s

29.

______ forces change momentum

a)

Nonconservative

b)

External

c)

Conservative

d)

Internal

30.

The white pool ball, hits the 8-ball (at rest). If the white ball stops, the 8-ball ends up

a)

stopped.

b)

moving slower than the initial speed of the white ball.

c)

moving just as fast as the initial speed of the white ball.

d)

moving faster than the initial speed of the white ball.

31.

Momentum conservation of an object is a direct consequence of

a)

Newton's first law.

b)

Newton's second law.

c)

Newton's third law.

d)

Newton's law of universal gravitation.

32.

Change in Momentum of an object is a direct consequence of

a)

Newton's first law.

b)

Newton's second law.

c)

Newton's third law.

d)

Newton's law of universal gravitation.

33.

True or False? The kinetic energy of a 1 kg ball moving at 2 m/s is the same as the momentum.

a)

true

b)

false

34.

Which one does NOT belong?

a)

kinetic

b)

momentum

c)

potential

d)

thermal

35.

A bug splatters on the windshield of your moving car. Which experiences the larger force?

a)

bug

b)

car

c)

neither

36.

A bug splatters on the windshield of your moving car. Which experiences the larger change in momentum?

a)

bug

b)

car

c)

neither

37.

A bug splatters on the windshield of your moving car. Which experiences the larger acceleration?

a)

bug

b)

car

c)

neither

38.

When you drop your phone, the earth rises up to meet it.

a)

true

b)

false - the earth does not move

c)

need more information

d)

false - the earth moves out of the way since I have a Nokia

39.

When two unequal mass objects collide ...

a)

the larger object experiences the larger momentum change.

b)

the smaller object experiences the larger momentum change.

c)

the objects trade momentum.

d)

both objects experience the same change in momentum.

40.

A bicycle has a momentum of 24 kg•m/s. What momentum would the bicycle have if it had twice the mass and was moving at the same speed?

a)

twice the momentum; 48 kg*m/s

b)

1/2 the momentum; 12 kg*m/s

c)

4x the momentum; 96 kg*m/s

d)

1/4 the momentum; 6 kg*m/s

41.

A bicycle has a momentum of 24 kg•m/s. What momentum would the bicycle have if it had the same mass and was moving with one-half the speed?

a)

twice the momentum; 48 kg*m/s

b)

1/2 the momentum; 12 kg*m/s

c)

4x the momentum; 96 kg*m/s

d)

1/4 the momentum; 6 kg*m/s

42.

A bicycle has a momentum of 24 kg•m/s. What momentum would the bicycle have if it had the twice the mass and was moving with twice the speed?

a)

twice the momentum; 48 kg*m/s

b)

1/2 the momentum; 12 kg*m/s

c)

4x the momentum; 96 kg*m/s

d)

1/4 the momentum; 6 kg*m/s

43.
An egg is thrown at a wall and at a bed sheet. The force of impact will be
a)
Greater against the wall
b)
Greater against the sheet
c)
Force is equal
44.

An egg is thrown at a wall and at a bed sheet, causing the egg to come to a stop. The egg's impulse will be

a)

Greater for the wall collision

b)

Greater for the sheet collision

c)

equal in both situations

45.
The purpose of crumble zones on a car is to
a)
decrease time of impact.
b)
increase force of impact.
c)
increase the time of impact.
d)
decrease the impulse during impact.
46.

Two objects collide and do not stick together.  What type of collision best describes this scenario?

a)

Elastic

b)

Inelastic

c)

Explosion

d)

Impulse

47.

If they are traveling at the same velocity, which would have more momentum, a 1000kg cart or a 700kg cart?

a)

They have the same momentum

b)

The 1000kg cart

c)

The 700kg cart

d)

There is not enough information to determine the answer

48.

Which of the following scenarios would result in the conservation of momentum?

a)

Collisions when the carts have the same mass and do not stick together.

b)

Collisions when the carts have different mass and do not stick together.

c)

Collisions when the carts have the same mass and do stick together.

d)

All of these collisions would result in conservation of momentum.

49.

Which of the following scenarios would result in the conservation of kinetic energy?

a)

Collisions when the carts have the same mass and do not stick together.

b)

Collisions when the carts have different mass and do stick together.

c)

Collisions when the carts have the same mass and do stick together.

d)

All of these collisions would result in conservation of kinetic energy.

50.

A roller coaster climbs up a hill at 4 m/s, and then zips down the hill at 30 m/s.  The mass of the roller coaster remains the same.  The momentum of the roller coaster is…

a)

greater up the hill than down the hill.

b)

greater down the hill than up the hill.

c)

remains the same throughout the ride.

d)

zero throughout the ride.

51.

A ball with a momentum of 4 kg∙m/s hits a wall and bounces straight back in the opposite direction without losing any kinetic energy.  What is the ball’s new momentum?

a)

-8.0  kg∙m/s

b)

-4.0 kg∙m/s

c)

0.0 kg∙m/s

d)

4.0 kg∙m/s

52.

When two objects collide, 

a)

momentum is always conserved.

b)

kinetic energy is always conserved.

c)

neither momentum nor kinetic energy is conserved.

d)

both momentum and kinetic energy are always conserved.

53.

On a position vs. time graph, how can you determine the object's velocity?

a)

Slope

b)

Area under the curve

c)

Second derivative of the position graph

d)

Cannot be determined

54.

On a velocity vs. time graph, what does the area under the curve represent?

a)

Object's Acceleration

b)

Object's Velocity

c)

Object's Change in Velocity

d)

Object's Displacement

55.

On a velocity vs. time graph, what does the slope of the curve represent?

a)

Object's Acceleration

b)

Object's Velocity

c)

Object's Change in Mass

d)

Object's Displacement

56.

Which of the following words will correctly finish this statement?

During projectile motion, an object accelerates at _____ in the _________ direction and moves at a _______velocity in the ________ direction.

a)

g, y, constant, x

b)

g, x, changing, y

c)

0, x, constant, y

d)

g, x, constant, y

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