Accelerated Motion Review

A _________ shows how velocity is related to time for an object.

• acceleration

• velocity-time graph

• free-fall acceleration

• free fall

The rate at which an object's velocity changes is its:

• acceleration

• velocity-time graph

• free-fall acceleration

• free fall

The motion of falling objects when air resistance is negligible is called:

• acceleration

• velocity-time graph

• free-fall acceleration

• free fall

The acceleration of an object in free fall that results from the influence of Earth's gravity is:

• acceleration

• velocity-time graph

• free-fall acceleration

• free fall

The _______ acceleration of an object is its change in velocity during some time interval divided by that time interval.

The change in an object's velocity at an instant is called its _____________ acceleration.

Which of the following objects has the greatest magnitude of acceleration?

• A falling acorn accelerates from 0.5 m/s to 10.3 m/s in 1.0 s.

• A car accelerates from 20 m/s to rest is 1 s.

• A centipede accelerates from 0.40 cm/s to 2.0 cm/s in 0.50 s.

• A golf ball accelerates from rest to 4.3 m/s in 0.40 s.

• A jogger accelerates from 2.0 m/s to 1.0 m/s in 8.3 s.

Which of the following objects has the smallest magnitude of acceleration?

• A falling acorn accelerates from 0.5 m/s to 10.3 m/s in 1.0 s.

• A car accelerates from 20 m/s to rest is 1 s.

• A centipede accelerates from 0.40 cm/s to 2.0 cm/s in 0.50 s.

• A golf ball accelerates from rest to 4.3 m/s in 0.40 s.

• A jogger accelerates from 2.0 m/s to 1.0 m/s in 8.3 s.

The graph describes the motion of an object. East is the positive direction. What is the objects acceleration during the first 5.0 min of travel?

The graph describes the motion of an object. East is the positive direction. What is the objects acceleration from 10 to 15 minutes?