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Unit 3 Mastery Quiz #2

Authored by Victor Castillo

Physics

12th Grade

Used 5+ times

Unit 3 Mastery Quiz #2
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15 questions

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1.

OPEN ENDED QUESTION

15 mins • 2 pts

Describe the difference between elastic and inelastic collisions. 

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Answer explanation

In elastic collisions, objects start separate, collide, and bounce off. In inelastic collisions, objects start separate, collide, and become stuck together. 

2.

OPEN ENDED QUESTION

15 mins • 2 pts

Describe the difference between recoil and moving separation.

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Answer explanation

In recoil, objects at rest start attached and are forced to separate due to an internal force. The same occurs in moving separation except that objects do not start at rest (they are in motion at some nonzero velocity while attached).

3.

MULTIPLE CHOICE QUESTION

15 mins • 2 pts

Which of the following has the LEAST amount of momentum?

A 750 kg car traveling at 25.0 m/s

A 210 kg sailplane traveling at 90 m/s

A 4,650 kg motorboat traveling at 5.0 m/s.

A 30,000 kg truck traveling at 0.75 m/s

Answer explanation

Use the following formula on EACH answer choice:

p = m x v

The one with the LEAST amount of momentum is the car.

4.

MULTIPLE CHOICE QUESTION

15 mins • 2 pts

Which of the following has the GREATEST amount of momentum?

A 750 kg car traveling at 25.0 m/s

A 210 kg sailplane traveling at 90 m/s

A 4,650 kg motorboat traveling at 5.0 m/s.

A 30,000 kg truck traveling at 0.75 m/s

Answer explanation

Use the following formula on EACH answer choice:

p = m x v

The one with the LEAST amount of momentum is the car.

5.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Cart X (m = 3.0 kg) is traveling to the right at 4.00 m/s toward Cart Y. Cart Y (m = 9.00 kg) is traveling to the left at 1.33 m/s.

Which cart has the larger magnitude of momentum, and why?

Cart X has the larger magnitude of momentum because it has a larger magnitude of velocity.

Cart X has the larger magnitude of momentum because it has the larger product of mass and velocity.

Cart Y has the larger magnitude of momentum because it has a larger mass.

Cart Y has the larger magnitude of momentum because it has the larger product of mass and velocity.

6.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Johnny spits out a wad of chewed bubble gum, giving the gum 2X units of momentum. The gum collides and sticks to a small box that is initially at rest.

What type of collision occurred between the gum and the box?

Elastic because the objects stick together

Elastic because the objects bounce off each other.

Inelastic because the objects stick together.

Inelastic because the objects bounce off each other.

7.

MULTIPLE CHOICE QUESTION

30 sec • 2 pts

Cart X (m = 3.0 kg) is traveling to the right at 4.00 m/s toward Cart Y. Cart Y (m = 9.00 kg) is traveling to the left at 1.33 m/s.

Cart X and Cart Y collide inelastically.

Calculate the total momentum of the two-cart system after the collision.

HINT: MAKE SURE YOU KNOW THE DIRECTION OF THE CARTS!!

0.03 kg*m/s

2.67 kg*m/s

5.22 kg*m/s

23.9 kg*m/s

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