PHY100 Ch03

Multiple Choice

The diagram shows the positions at 0.10-sec intervals of a ball moving left to right. Is the ball accelerated?

• Yes

• No

• Unable to determine

Multiple Choice

The diagram shows the positions at 0.05-sec intervals of two balls moving left to right. Are either or both of these balls accelerated?

• Ball A is accelerated

• Ball B is accelerated

• Both balls are accelerated

• Neither ball is accelerated

Multiple Choice

The velocity-versus-time graph for a certain falling object is shown. Is the acceleration of this object constant?

• Yes

• No

• Impossible to tell from this graph

Multiple Choice

What is the ball’s acceleration at the top of its path (at t = 2s)?

• zero

• +10 m/s

• -10 m/s

• +10 m/s^2

• -10 m/s^2

Multiple Choice

Does this represent a realistic trajectory?

• Yes

• No

• Maybe

Multiple Choice

Which of these three balls would hit the floor first if all three left the tabletop at the same time?

• The ball with initial velocity v1

• The ball with initial velocity v2

• The ball with initial velocity v3

• They would all hit at the same time

Multiple Choice

Which free-throw trajectory has the greatest chance of success?

• Upper

• Middle

• Lower

Multiple Choice

Which of the two trajectories shown will result in a longer time for the ball to reach home plate?

• The higher trajectory

• The lower trajectory

• They will take the same