ap physics 1 - kinematics multiple choice

AP Physics 1 Unit 1-4 Test Review 1.

An object that’s moving with constant speed travels once around a circular path. Which of the following statements are true concerning this motion? Select two answers.

a) b) c) d) 2.

The displacement is zero The average speed is zero The acceleration is zero The velocity is changing

In section five of the velocity-time graph, the object is:

Velocity v. Time 1.5

1

0.5

0 0

1

2

3

4

5

6

7

8

9

-0.5

-1

-1.5

a) b) c) d) 3.

Which of the following statements are about uniformly accelerated motion? Select two answers a) b) c) d)

4.

Speeding up, moving in the positive direction Slowing down, moving in the positive direction Speeding up, moving in the negative direction Slowing down, moving in the negative direction

If an object’s acceleration is constant, constant, then it must move in a straight line If an object’s acceleration is zero, then its speed must remain constant If an object’s speed remains constant, then its acceleration must be zero If the object’s direction of motion is changing, then the acceleration is non -zero

A baseball is thrown straight upward, what is the ball’s acceleration at its highest point?

a) b) c) d)

1⁄2 ,   ,   1⁄2 ,   ,  

AP Physics 1 Unit 1-4 Test Review 5.

How long would it take a car, starting from rest and accelerating uniformly in a straight line at 5 m/s2, to cover a distance of 200 m? a) b) c) d)

6.

A rock is dropped off a cliff and strikes the ground with an impact velocity of 30 m/s. How high was the cliff? a) b) c) d)

7.

1s 2s 4s 8s

A soccer ball, at rest on the ground, is kicked with an initial velocity of 10 m/s at a launch angle of 30 degrees. Calculate its total flight time, assuming that air resistance is negligible. a) b) c) d)

9.

20 m 30 m 45 m 60 m

A stone is thrown horizontally with an initial speed of 10 m/s from a bridge. If air resistance could be ignored how long would it take the stone to strike the water 80 m below the bride? a) b) c) d)

8.

9.0s 10.5s 12.0s 15.5s

0.5 s 1s 2s 4s

A stone is thrown horizontally with an initial speed of 30 m/s from a bridge. Find the stone’s total speed when it enters the water 4 seconds later. Ignore air resistance.

a) b) c) d)

30 m/s 40 m/s 50 m/s 60 m/s

10. Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45 degrees to the horizontal? a) The acceleration vector points opposite to the velocity vector on the way up and in the same direction as the velocity vector on the way down b) The speed at the top of the trajectory is zero c) The object’s total speed remains constant during the entire flight  d) The vertical speed decreases on the way up and increases on the way down.