AP Physics Physics: Classical Mechanics & Kinematics 2

Question 1

A projectile is launched at 30° above the horizontal with an initial speed of 20 m/s. What is the maximum height reached? (g = 10 m/s²)

Accepted Answer

5 m

Answer

2.5 m

Answer

10 m

Answer

20 m

Question 2

A 5 kg block slides down a frictionless incline of angle 37°. What is the block's acceleration? (g = 10 m/s², sin37° ≈ 0.6)

Accepted Answer

6 m/s²

Answer

4 m/s²

Answer

8 m/s²

Answer

10 m/s²

Question 3

Two objects with masses 2 kg and 4 kg experience the same net force. What is the ratio of their accelerations (a₂ kg / a₄ kg)?

Accepted Answer

2:1

Answer

1:2

Answer

1:4

Answer

4:1

Question 4

A car traveling at 20 m/s decelerates uniformly and stops in 4 seconds. What distance does it travel while stopping?

Accepted Answer

40 m

Answer

20 m

Answer

60 m

Answer

80 m

Question 5

Which of the following correctly describes the velocity of an object in uniform circular motion?

Accepted Answer

Constant in magnitude, changing in direction

Answer

Constant in magnitude and direction

Answer

Changing in magnitude, constant in direction

Answer

Changing in both magnitude and direction

Question 6

A 10 kg box is pushed across a floor with a coefficient of kinetic friction μₖ = 0.3. What friction force acts on the box? (g = 10 m/s²)

Accepted Answer

30 N

Answer

3 N

Answer

10 N

Answer

100 N

Question 7

An object is thrown vertically upward. At its peak, which statement is true?

Accepted Answer

Velocity is zero and acceleration is g downward

Answer

Velocity is zero and acceleration is zero

Answer

Velocity is maximum and acceleration is zero

Answer

Both velocity and acceleration are directed downward