Front

Position

Back

The place where the object is or an object’s location.

Front

Motion

Back

A change in the position of an object.

Front

Reference Point

Back

A fixed place or object that tells whether another object is in motion.

Front

Relative Motion

Back

The change in one object’s position compared with another object's position.

Front

Force

Back

A push or pull upon an object resulting from interacting with another object. The strength of force is measured in Newtons.

Front

Contact Force

Back

A force between two objects that can only exist in contact with each other. Example: Friction.

Front

Friction

Back

The force that results when two materials rub against each other.

Front

Non-Contact Force

Back

A force applied to an object by another body that is not in direct contact with it. Examples: Gravity, Magnetism, Electricity.

Front

Gravity

Back

A non-contact force that pulls objects towards the center of the Earth.

Front

Air Resistance

Back

A type of friction that occurs when particles of air contact any surface.