Acceleration and Force

The rate at which velocity changes over time is

• Centripetal acceleration

• acceleration

• velocity

• Speed

How is acceleration expressed

• in seconds

• in meters per second per second

• . in seconds per meter

• in meters per second

The acceleration that occurs in circular motion called

• centripetal acceleration

• Speed

• velocity

• mass

Acceleration is a vector measurement because it has both a magnitude and

• direction

• speed

• distance

• . temperature

When are you undergoing acceleration in a car

• speed up

• Makes turns

• slow down

• All of the above

Acceleration is defined as the change in velocity divided by

• distance

• time

• speed

• final velocity

What is the average acceleration of a subway train that speeds up from 9.6 m/s to 12 m/s in 0.8 s on a straight section of track?

• 3 m/s2

• 6 m/s2

• 10 m/s2

• 12 m/s2

Which is an example of an object at rest?

• a jet flying overhead

• a rabbit jumping

• a chair on a floor

• . a ball hit by a bat

Which of the following is considered a contact force

• The force between two magnets.

• The gravitational pull of a planet.

• Friction between an object and air

• The force between two charged particles.

Which term describes the tendency of a moving object to continue moving at the same velocity unless an unbalanced force acts on it?

• Inertia

• Friction

• Gravity

• Acceleration