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Motion
Change in position.
Speed
How fast something moves.
Acceleration
Change in speed or direction.
Distance
How far something moves.
Reference point
Used to see if something is moving.
Simple machine
Tool that makes work easier.
Lever
A bar that pivots on a fulcrum.
Fulcrum
Support or pivot point of a lever.
Pulley
Wheel with rope to lift loads.
Inclined plane
Slanted surface to move things.
Screw
Inclined plane wrapped around a rod.
Wedge
Used for cutting or splitting.
Wheel and axle
Helps objects roll with less friction.