1st: Momentum and Impulse

Assessment

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Deleted User

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Physics

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9th - 12th Grade

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57 questions

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Multiple Choice

2 mins

1 pt

What is the formula for calculating momentum?

m=mv

p=m/v

p=v/m

p=vm

Multiple Choice

3 mins

1 pt

A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?

25 m/s

375 m/s

25 kg m/s

375 kg m/s

Multiple Choice

2 mins

1 pt

If two objects collide and stick together, what will happen to their overall momentum?

momentum will decrease

momentum will increase

momentum will stay the same

none of the above

Multiple Choice

2 mins

1 pt

Which takes more force to catch, a bowling ball or a ping pong ball?

bowling ball because it has more momentum

ping pong ball because it has more momentum

both require the same amount of force when catching

bowling ball because it has less momentum

Multiple Choice

2 mins

1 pt

If 2 objects collide and stick together, what will happen to their velocities?

velocities will increase

velocities will decrease

velocities will stay the same

none of the above

Multiple Choice

2 mins

1 pt

If an action force is a golf club hitting a golf ball, then the reaction force is

exerted on the golf ball

exerted on the golf cart

exerted on the golf club by the golf ball

exerted by the squirrel that is hiding in the tree

Multiple Choice

5 mins

1 pt

How much momentum does a stationary battle ship have if it has a mass of 2,575,000 kg?

2,575,000 N

2,575,000 kg m/s

0 Momentum requires mass and velocity

none of the above

Multiple Choice

2 mins

1 pt

The law of conservation of momentum states that,

p before is less than p after

p before is the same as p after

p before is more than p after

Multiple Choice

5 mins

1 pt

A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?

6030 kg

0.0134 kg

74.4 kg

80 kg

10.

Multiple Choice

1 min

1 pt

A bus hits a bug and the bug splatters on the windshield, which force is greater?

The Bus

The Bug

They're the same

Gravity acting on the bus

11.

Multiple Choice

1 min

1 pt

Newton's third law states that any action will have a(n) _______ and ______ reaction

Equal and similar

Equal and opposite

Equal and different

Greater and opposite

12.

Multiple Choice

15 mins

1 pt

When the same force is applied to both the male African elephant and the female Asian elephant, their acceleration is different. Why?

Male and female elephants have different heights.

The male elephant has more mass

The female elephant has probably eaten more

The male elephant has less mass

13.

Multiple Choice

45 sec

1 pt

In any collision (crash) the ______ is ALWAYS constant.

Total Momentum

total speed

total Velocity

Energy

14.

Multiple Choice

30 sec

1 pt

When is momentum conserved in a collision?

When the collision is inelastic.

When the collision is elastic.

When the collision is inelastic OR elastic but never an explosion.

In all collisions.

15.

Multiple Choice

3 mins

1 pt

What does "g" stand for?

Gravity

The Acceleration due to gravity

How much force gravity has

16.

Multiple Choice

30 sec

1 pt

A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?

0 kgm/s

30 kgm/s

50 kgm/s

10 kgm/s

17.

Multiple Choice

1 min

1 pt

The definition of momentum is

Mass in Motion

The size of an object

The velocity of an object

A comparison between two objects

18.

Multiple Choice

1 min

1 pt

The units for Impulse are

N/s

N-s

m/s

19.

Multiple Choice

30 sec

1 pt

Momentum is a ____________________ quantity

science

scalar

vector

energy

20.

Multiple Choice

30 sec

1 pt

T/F: A big truck will always have more momentum than a small car.

True

False

21.

Multiple Choice

1 min

1 pt

The purpose of air bags on a car is to

decrease time of impact.

increase force of impact.

increase the time of impact.

decrease the impulse during impact.

22.

Multiple Choice

1 min

1 pt

In this type of collision, objects tend to "stick" together.

elastic

inelastic

They "stick" together in both types of collisions

23.

Multiple Choice

30 sec

1 pt

Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds. Which cart experiences the greatest impulse?

Cart B

Cart A

they are the same

24.

Multiple Choice

1 min

1 pt

When the speed of an object is doubled, its momentum

remains unchanged in accord with the conservation of momentum.

doubles

quadruples

decreases

25.

Multiple Choice

2 mins

1 pt

The graph shows the force on an object of mass M as a function of time. For the time interval 0 to 4 s, the total change in the momentum of the object is

40 kg m/s

20 kg m/s

0 kg m/s

– 20 kg m/s

26.

Multiple Choice

30 sec

1 pt

If two objects have the same mass, then the faster moving object has ____________ momentum.

less

the same

27.

Multiple Choice

30 sec

1 pt

This is an example of what kind of collision?

Elastic

Inelastic

28.

Multiple Choice

30 sec

1 pt

If the kinetic energy of this collision IS conserved, the you would classify it as a _______________ collision.

elastic

inelastic

perfectly inelastic

29.

Multiple Choice

30 sec

1 pt

Maddy runs and jumps off of a diving board and lands on a tube (she stays in the tube). The collision between Maddy and the tube is

Elastic

Somewhat inelastic

Perfectly Inelastic

Completely absurd

30.

Multiple Choice

30 sec

1 pt

Two objects of the same mass collide with each other. The second object is at rest and the first is moving at 5 m/s North before the collision. After the collision, the first mass is at rest and the second mass continues at 5 m/s North. In this collision, quantities that are conserved include:

Momentum only

Momentum and Kinetic Energy

Kinetic Energy only

31.

Multiple Choice

30 sec

1 pt

Two objects of the same mass collide with each other. The second object is at rest and the first is moving at 5 m/s North before the collision. After the collision, the first mass is at rest and the second mass continues at 5 m/s North.
The type of collision represented by these two masses is

Inelastic

Completely Inelastic

Elastic

32.

Multiple Choice

30 sec

1 pt

Tanner is moving at a velocity of 3 m/s South when he jumps into a sled that is at rest. The quantities that are conserved during this collision include:

Kinetic Energy only

Momentum only

Momentum and kinetic energy

33.

Multiple Choice

30 sec

1 pt

Kai observed a collision in lab where the kinetic energy after the collision was equal to the kinetic energy before the collision. This type of collision is

Completely Inelastic

Elastic

Inelastic

34.

Multiple Choice

30 sec

1 pt

Molly noticed a collision outside the coffee shop where two cars collided and stuck together. What type of collision did she observe?

Elastic

Inelastic

Completely inelastic

35.

Multiple Choice

30 sec

1 pt

A collision where momentum is conserved, kinetic energy is not conserved, and the objects bounce off of each other (do not stick together) is referred to as

Elastic

Inelastic

Completely inelastic

36.

Multiple Choice

15 mins

1 pt

A 2.5 kg ball moving at 4.2 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision. What is the velocity of the second ball after the collision?

2.1 m/s

2.5 m/s

4.2 m/s

8.4 m/s

37.

Multiple Choice

45 sec

1 pt

When the speed of an object is doubled, its momentum

remains unchanged in accord with the conservation of momentum.

doubles

quadruples

decreases

38.

Multiple Choice

45 sec

1 pt

An 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the left at 2 m/s. The final velocity of both objects will be

0 m/s

1 m/s

2 m/s

4 m/s

39.

Multiple Choice

3 mins

1 pt

A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?

8 m/s

32 m/s

0.125 m/s

18 m/s

40.

Multiple Choice

1 min

1 pt

The units for Impulse are

N/s

N-s

m/s

41.

Multiple Choice

45 sec

1 pt

A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?

0 kgm/s

30 kgm/s

50 kgm/s

10 kgm/s

42.

Multiple Choice

30 sec

1 pt

T/F: Impulse is a force.

True

False

43.

Multiple Choice

30 sec

1 pt

T/F: Two objects that collide will have the same magnitude of impulse.

True

False

44.

Multiple Choice

1 min

1 pt

T/F: During a collision, one object will gain momentum and the second object will lose the same amount of momentum gained by the first object.

True

False

45.

Multiple Choice

30 sec

1 pt

T/F: The following equation may be used in our lab calculations: Δp = p_i - p_f

True

False

46.

Multiple Choice

30 sec

1 pt

T/F: Conservation of momentum means that the momentum of an object before a collision is the same as the object's momentum after the collision.

True

False

47.

Multiple Choice

30 sec

1 pt

T/F: Conservation of momentum means that the momentum of all objects before a collision is the same as all objects' momentum after the collision.

True

False

48.

Multiple Choice

30 sec

1 pt

An axe is used to strike a tree. Compared with the time the axe acts on the tree...

the tree acts for less time on the axe.

the tree acts for more time on the axe.

the tree acts for the same amount of time on the axe.

49.

Multiple Choice

30 sec

1 pt

Cole is riding a motorbike while wearing a helmet with a face shield. A beetle hits Cole's face shield while Cole is moving at 30 mph. Which undergoes the greater change in momentum?

Cole

Beetle

both are the same

50.

Multiple Choice

30 sec

1 pt

Cole is riding a motorbike while wearing a helmet with a face shield. A beetle hits Cole's face shield while Cole is moving at 30 mph. Which undergoes the greater force?

Cole

Beetle

both are the same

51.

Multiple Choice

30 sec

1 pt

Cole is riding a motorbike while wearing a helmet with a face shield. A beetle hits Cole's face shield while Cole is moving at 30 mph. Which undergoes the greater impulse?

Cole

Beetle

both are the same

52.

Multiple Choice

30 sec

1 pt

Cole is riding a motorbike while wearing a helmet with a face shield. A beetle hits Cole's face shield while Cole is moving at 30 mph. Which undergoes the greater acceleration?

Cole

Beetle

both are the same

53.

Multiple Choice

1 min

1 pt

A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N s.

-2.5
.
.

-10

-18

-45

54.

Multiple Choice

45 sec

1 pt

A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The time for the collision is _____ seconds.

1.8
.
.

2.5

3.6

55.

Multiple Choice

2 mins

1 pt

A 0.5 kg ball moving at 5 m/s strikes a wall and rebounds in the opposite direction with a speed of 2 m/s. The time the ball is in contact with the ball is 0.01 s. Calculate the force acting on the ball by the wall during the collision. F = ______ N (magnitude only)

0.14

150

350

500

56.

Multiple Choice

30 sec

1 pt

Which has the greater change in momentum? An object that stops in a collision or the same object that bounces (rebounds) in a collision. Assume the object has the same speed and time of contact.

Stops

Bounces

Both are the same

57.

Multiple Choice

1 min

1 pt

When is momentum conserved in a collision?

When the collision is inelastic.

When the collision is elastic.

When the collision is inelastic OR elastic but never an explosion.

All collisions.

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