Chapter 9 Motion

A place or object used for comparison to determine if something is in motion is called

• constant

• reference point

• position

• motion

Speed is measured in

• seconds

• minutes

• meters

• meters/second

A change in position with respect to reference point is

• acceleration

• velocity

• direction

• motion

You do not know an object's velocity until you know

• speed and distance

• reference point

• speed and direction

• acceleration

If you know a car travels 30 km in 20 minutes, you can find its

• acceleration

• average speed

• direction

• velocity

Acceleration is a change in speed or

• time

• slope

• distance

• direction

The rate at which velocity changes is called

• acceleration

• constant speed

• average speed

• velocity

The distance an object travels per unit of time is called acceleration.

• True

• False

The SI unit for length is

• inch

• foot

• liter

• meter

The formula for speed is

• Speed = Distance x Time

• Speed = Distance / Speed

• Speed = Distance/Time

• Speed = Time/Speed