Ch. 1 Motion Vocabulary A

Front

What is acceleration?

Back

The measure of the change in velocity during a period of time.

Front

An object is said to be in __________ if its position changes with time.

Back

motion.

Front

What is the gravitational force exerted on an object's mass?

Back

Weight; it is proportional to its mass.

Front

What is motion?

Back

The process of changing position.

Front

What is a reference point?

Back

A point used to determine the position of an object.

Front

What is velocity?

Back

The speed of an object in a given direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What is friction?

Back

A force that opposes the motion of an object.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is the unit of acceleration?

Back

Meters per second squared (m/s²).