potential energy - energy that has not been released, kinetic energy - energy in motion, inertia - the tendency for an object to stay at rest or in motion, Newton's 1st Law of Motion - An object in motion or at rest tends to stay that way unless acted on by an outside force, force - push or pull of an object, motion - object moving in any direction, Gravity - a non-contact force that pulls everything to Earth, Mass - the amount of matter in an object, Weight - The measure of force of gravity on an object, friction - a contact force that slows, stops, or changes direction of an object,

Force and Motion

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