Question 13 (2 points) What is the centripetal acceleration of a jet making a turn with a radius of 0.50 km at a speed of 343 m/s?
Question 13 options:

686 m/s/s

0.7 m/s/s

235 m/s/s

235000 m/s/s
Question 14 (2 points)
Which force produces the largest torque?
Question 14 options:

20.0 N perpendicular to the center of rotation at a radius of 0.5 m

20.0 N perpendicular to the center of rotation at a radius of 1.0 m

10.0 N perpendicular to the center of rotation at a radius of 0.25 m

10.0 N perpendicular to the center of rotation at a radius of 1.5 m
Question 15 (2 points)
A tennis ball is hit across the court, raising up and coming back down. Which of the following statements is true about the tennis ball at the top of its path?
Question 15 options:

The horizontal velocity is zero.

The horizontal acceleration is zero.

The vertical acceleration is zero.

All the other statements are false.
Question 16 (2 points)
What is the name for the path a projectile takes?
Question 16 options:

hyperbolic path

trajectory

centripetal

linear path
Question 17 (2 points)
The centripetal force always points�
Question 17 options:

outside the circle

to the center of the circle

in the direction of the motion

tangential to the circle
Question 18 (2 points)
A plumber needs to increase the torque to unfasten a pipe. How can they do this?
Question 18 options:

Apply more force ONLY.

Get a longer wrench ONLY.

Apply more force AND get a longer wrench.

Neither more force nor a longer wrench will help.
Question 19 (2 points)
A T-shirt cannon needs to launch shirts as far as possible. What angle should the cannon be fired at?
Question 19 options:

Parallel to the ground

30 degrees over the ground

45 degrees over the ground

60 degrees over the ground
Question 20 (2 points)
What forces are acting on a projectile as it flies through the air?
Question 20 options:

gravity and normal

gravity and applied

gravity and tension

just gravity
Question 21 (2 points)

Two balls are thrown at the heights and velocities shown in the figure. Which ball will hit the floor first?

Question 21 options:

Ball A will hit the floor first.

Ball B will hit the floor first.

Both balls will hit the floor at the same time.

There is not enough information to answer the question.
Question 22 (2 points)

Two balls are thrown at the heights and velocities shown in the figure. Which ball travel farther to the right?

Question 22 options:

Ball A will go farther.

Ball B will go farther.

They will both hit the floor at the same place.

There is not enough information to answer the question.
Question 23 (2 points)
If the centripetal force suddenly stops, an object traveling in a circle will
Question 23 options:

continue traveling along the tangent line to the circular path.

continue traveling along the circular path.

stop moving.

continue traveling in some random direction.
Question 24 (2 points)
Which statement about a HORIZONTAL projectile is false?
Question 24 options:

The horizontal velocity is constant.

The horizontal acceleration is constant.

The vertical velocity is constant.

The vertical acceleration is constant.
Question 25 (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 tangential velocity of the washer at that instant in time?

Question 25 options:

arrow A

arrow B

arrow C

arrow D