AP Physics C Mechanics

A block of mass 3 kg, initially at rest, is pulled along a frictionless, horizontal surface with a force shown as a function of time t by the graph above.

The speed of the block at t = 2s is

• 4/3 m/s

• 8/3 m/s

• 4 m/s

• 8 m/s

• 24 m/s

Tags

NGSS.HS-PS2-1

The position of an object is given by the equation x = 3.0 t2 + 1.5 t + 4.5, where x is in meters and t is in seconds. What is the instantaneous acceleration of the object at t = 3.0 s?

• 3.0 m/s/s

• 6.0 m/s/s

• 9.0 m/s/s

• 19.5 m/s/s

• 36 m/s/s

Tags

NGSS.HS-PS2-1

The position of a toy locomotive moving on a straight track along the x-axis is given by the equation x = t³ – 6t² + 9t, where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to

• zero

• 2 s

• 3 s

• 4 s

• 5 s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

The graph above shows the velocity v as a function of time t for an object moving in a straight line. Which of the following graphs shows the corresponding displacement x as a function of time t for the same time interval?

• 
• 
• 
• 
• 

An object falls freely from rest under the influence of gravity. If air resistance is negligible, the ratio of the distances traveled during each 1-second time interval by the object during the first, second, and third seconds of its fall is

• 1:1:1

• 1:2:3

• 1:2:4

• 1:3:5

• 1:4:9

Tags

NGSS.HS-PS2-4

The graph above shows velocity as a function of time for a cart moving on a straight, horizontal track.

At which labeled point does the cart have the greatest speed?

• A

• B

• C

• D

• E

The graph above shows velocity as a function of time for a cart moving on a straight, horizontal track. At which labeled point does the velocity of the cart change direction?

• A

• B

• C

• D

• E

A student performs an experiment to determine whether an object released from rest truly exhibits free-fall motion. The student takes data of distance d that the object has fallen at various times t after the object is released. If the object does exhibit free-fall motion, which of these graphs will be a line?

• d vs. t

• d vs. t²

• d² vs. t

• d² vs. t²

The position as a function of time for an object moving a straight line is shown in the graph. Which of the following best describes the object’s speed and direction of motion during the time internal shown?

• Speed – Increasing, Direction – Positive

• Speed – Decreasing, Direction – Positive

• Speed – Decreasing, Direction - Negative

• Speed – Increasing, Direction – Negative

Kyle's velocity can be described with the formula v(t)=60t. How far does he travel between t=5s and t=8s?

• 1170m

• 1000m

• 840m

• 900m