Force
A push or pull that can change that motion of an object
Balanced Forces
Forces on an object that do not change the object
Net Force
The sum if a the forces acting on an object
Un-Balanced Forces
Forces of an object that cause change in the motion of the object
Speed
The measure of the rate of change position with respect of time
At Rest
The state of an object when it is not in motion
Motion
A change in an objects postion, direction, or location
Direction
The path that an object is moving or facing
Friction
A force between two surfaces rubbing against each other; friction works against motion