Friction		occurs when two objects rub against each other.
Inertia		is an object in motion
Unbalanced Forces		causes a change in position or motion.
Balanced Objects		is unchanging velocity
Equilibrium		where there is no motion or change
Speed		is how fast it travels
Velocity		is to stay in motion or at rest unless an outside force.
Constant speed		is the ability to do work
Acceleration is		the speed and direction of a moving object
Potential energy		the same as speeding up
Kinetic energy		is energythat is stored in an object
Energy		causes no change in position or motion