Separate forces on an object that combined do not change the movement of the object.

Forces on an object that cause change in the motion of the object.

The total of all the forces acting on an object.

At Rest

The change in an object's position with respect to time and location.

The rate of change of distance with respect to time.

Force that opposes the motion of one surface across another.

Velocity

Acceleration

An object at rest stays at rest or an object in motion stays in motion until an unbalanced force acts upon it.

Acceleration of an object depends on the object's mass and the amount of the force acting upon it. F=ma

For every action there is an equal and opposite reaction.