An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Force that opposes the motion of objects that move through the air

Forces that produce a nonzero net force, which changes an object's motion

The amount of matter in an object

The motion of a falling object when the only force acting on it is gravity

Force = mass x acceleration

A push or pull exerted on an object

The tendency of an object to resist a change in its motion

The force or speed with which something moves

The speed and direction of a moving object

A measure of the force of gravity on an object

The resistance that one surface or object encounters when moving over another.

For every action there is an equal and opposite reaction

The rate at which velocity changes

A force of attraction between objects that is due to their masses.

A force that causes an object to move in a circle