VOCABULARY

Mass

The amount of matter in an object: a measure of inertia

Force

Any influence that tends to accelerate an object: a push or a pull

Weight

The force on a body due to gravitaional attraction of another body

Acceleration

The rate at which velocity changes. May be in both magnitude, direction, or both

Action Force

One pair of forces described in Newtons 3rd Law

Interaction

A mutual action between objects where each objects exerts an equal and opposite force on the other

Reaction Force

The force that is equal in strength and oposite in direction to the action force, which acts simultaneously on what ever is exerting the action force

Newtons 3rd Law

Whenever one body exerts a force on a second body, the second body exerts an equal and opposite force on the force on the first.