Force and Motion

A measure of the force of gravity on an object

• inertia

• weight

• gravity

• mass

A push or pull exerted on an object

• velocity

• force

• friction

• inertia

The rate at which velocity changes

• velocity

• momentum

• inertia

• acceleration

A force that causes an object to move in a circle

• gravity

• balanced force

• centripetal force

• momentum

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

• friction

• air resistance

• free fall

• gravity

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

• inertia

• weight

• centripetal force

• free fall

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.

• Newton's Second Law

• Inertia

• Acceleration

• Newton's First Law

The force or speed with which something moves

• inertia

• momentum

• acceleration

• velocity

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

• friction

• inertia

• velocity

• gravity

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

• mass

• friction

• inertia

• gravity