Question 1 (2 points) A ball is thrown off a deck and lands 25m from where it was thrown.

If the ball shown in the figure lands in 1.0 s, about what height was it thrown from?

Question 1 options:

1 m

5 m

20 m

25 m
Question 2 (2 points)

In the figure, a washer on a string (string not shown) moves in the circular path shown in red. Which arrow BEST describes the direction of the force acting on the washer at that instant in time?

Question 2 options:

arrow A

arrow B

arrow C

arrow D
Question 3 (2 points)
A CD spins at a constant angular velocity of 5.0 revolutions per second clockwise. Which of the following statements about the CD is true?
Question 3 options:

A net torque acts on it clockwise to keep it moving.

A net torque acts on it counterclockwise to keep it moving.

No net torque acts on it at all.
Question 4 (2 points)
The moon's gravity is one-sixth that of the earth. How does the period of a 0.50m long pendulum on the moon compare to the period of the same pendulum on Earth?
Question 4 options:

The period on Earth is longer.

The period on the moon is longer.

The period is the same on the moon and on Earth.

There isn't enough information to answer the question.
Question 5 (2 points)
The moon's gravity is one-sixth that of the earth (g =1.6 m/s/s). What is the period of a 2.00 m long pendulum on the moon?
Question 5 options:

3.5 s

7.0 s

2.8 s

2.5 s
Question 6 (2 points)
An archer shoots an arrow horizontally and his friend drops a marble from the same height when the arrow is released. In the absence of air resistance, which of the following happens?
Question 6 options:

The arrow hits the ground first.

The marble hits the ground first.

Both hit the ground at the same time.

You cannot tell from the information given.
Question 7 (2 points)
Two identical pendulums are on the surface of Mars and Earth. The period of the Mars pendulum is longer than the one on Earth. Why?
Question 7 options:

There is more friction from the Martian atmosphere.

The acceleration due to gravity on Mars is greater than that on Earth.

The rotation of Mars affects a pendulum more than Earth.

The acceleration due to gravity on Mars is less than that on Earth.
Question 8 (2 points)

For the seesaw depicted in the diagram, which of the following will happen?

Question 8 options:

The seesaw will rotate counterclockwise.

The seesaw will rotate clockwise.

The seesaw will remain balanced.

You cannot tell from the information provided.
Question 9 (2 points)
What force causes centripetal acceleration of a car making a turn on a flat road?
Question 9 options:

gravity

normal force

friction

weight
Question 10 (2 points)

In the figure, which arrow designates a factor that the period of the pendulum's motion depends on?

Question 10 options:

arrow A

arrow B

arrow C

arrow D
Question 11 (2 points)

In the figure, which arrow designates the amplitude of the pendulum's motion?

Question 11 options:

arrow A

arrow B

arrow C

arrow D
Question 12 (2 points)

In the figure, which arrow designates the angular displacement of the pendulum's motion?

Question 12 options:

arrow A

arrow B

arrow C

arrow D