Quiz about AP Physics Collisions

Question 1

Collisions can be ____________or ___________.

Accepted Answer

elastic or inelastic

Answer

fast or slow

Answer

far or near

Answer

none of the above

Question 2

What is kinetic energy?

Accepted Answer

energy of motion

Answer

energy of work

Answer

energy of gravity

Answer

energy of power

Question 3

Which of the following would transfer more energy?

Accepted Answer

Raising ball 1 higher before release

Answer

Lowering ball 1 before release

Answer

Gently putting ball 1 down next to ball 2

Answer

Keeping ball 1 in the same place

Question 4

What happens when two objects collide?

Accepted Answer

Energy is transferred from one object to another.

Answer

Energy is changed into force.

Answer

Energy is created and the objects move faster.

Question 5

While playing with toy cars, Kirsten and Luca each push a car toward the center of the room. What happens when the toy cars collide?

Accepted Answer

Energy is transferred.

Answer

Energy is unchanged.

Question 6

The picture shows what type of collision?

Accepted Answer

Inelastic Collision

Answer

Elastic, Inelastic and Perfectly Inelastic Collision

Answer

Perfectly Inelastic Collision

Answer

Elastic Collision

Question 7

The faster an object moves, the ________ kinetic energy it has.

Accepted Answer

more

Answer

less

Answer

none of the above

Answer

all of the above

Question 8

In a perfectly elastic collision, which of the following is conserved?

Accepted Answer

Both momentum and kinetic energy

Answer

Momentum only

Answer

Kinetic energy only

Answer

Neither momentum nor kinetic energy

Question 9

Two cars collide and stick together after the collision. What type of collision is this?

Accepted Answer

Inelastic collision

Answer

Elastic collision

Answer

Perfectly elastic collision

Answer

Superelastic collision

Question 10

Which of the following equations represents the conservation of momentum in a collision?

Accepted Answer

$$m_1v_1 + m_2v_2 = m_1v_1$$

Answer

$$m_1v_1 - m_2v_2 = m_1v_1$$

Answer

$$m_1v_1 = m_2v_2$$

Answer

$$m_1v_1$$

Question 11

A ball of mass 2 kg moving at 3 m/s collides with a stationary ball of mass 1 kg. If the collision is perfectly elastic, what is the velocity of the 1 kg ball after the collision?

Accepted Answer

3 m/s

Answer

1 m/s

Answer

2 m/s

Answer

4 m/s

Question 12

Which of the following best describes an inelastic collision?

Accepted Answer

Objects stick together and move as one mass after collision

Answer

Objects bounce off each other with no loss of kinetic energy

Answer

Objects explode apart with increased kinetic energy

Answer

Objects move in opposite directions with equal speed

Question 13

A 5 kg object moving at 4 m/s collides with a 3 kg object moving at 2 m/s in the opposite direction. What is the velocity of the combined mass after a perfectly inelastic collision?

Accepted Answer

0.5 m/s

Answer

1 m/s

Answer

2 m/s

Answer

3 m/s

Question 14

During a collision, the change in kinetic energy is given by which of the following expressions?

Accepted Answer

$$\frac{1}{2}m(v^2 - u^2)$$

Answer

$$m(v - u)$$

Answer

$$\frac{1}{2}m(v + u)^2$$

Answer

$$m(v^2 + u^2)$$

AP Physics Collisions

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