Front

What is force?

Back

A push or pull on an object that can cause it to move, stop, or change direction.

Front

What is motion?

Back

The change in position of an object over time.

Front

What is gravity?

Back

A force that pulls objects toward each other, especially the pull of the Earth on objects.

Front

What is a balanced force?

Back

Forces that are equal in size but opposite in direction, resulting in no change in motion.

Front

What is an unbalanced force?

Back

Forces that are not equal, causing a change in motion of an object.

Front

What is a reference point?

Back

A stationary object used to determine if another object is in motion.

Front

How does mass affect gravity?

Back

As an object's mass increases, the gravitational force it exerts also increases.

Front

What is inertia?

Back

The tendency of an object to resist changes in its state of motion.

Front

What is friction?

Back

A force that opposes the motion of an object when it comes into contact with another object.

Front

What is speed?

Back

The distance an object travels per unit of time.