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How fast is the object moving?

The speed in a given direction

The change in velocity of an object

What is acceleration?

A

change in velocity

B

change in speed

C

change in position

D

change in direction

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down

the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed

is 22 m/s. What is its average acceleration?

the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed

is 22 m/s. What is its average acceleration?

A

16 m/s2

B

26 m/s2

C

6 m/s2

D

60 m/s2

Use the graph below to complete the table below.

Between C and D

Between C and D

A

Object moves forward and slows down.

B

Object moves at a constant velocity

C

object is not moving

D

Object moves forward and speeds up.

Aidan drops a rock from a cliff. After 4.0 s the rock is moving at 39.2 m/s. What is the acceleration of the rock?

Name two words related to acceleration