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14 Cards in this Set

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Lever
A bar that pivots on a fulcrum. A part of a simple machine used to raise heavy weights.
Work
Moving something over a distance.
Repulsion
Pushing
Motion
Moving, changing position.
Machine
Anything that helps people do work.
Friction
A force that opposes motion when two surfaces rub against each other. (Groundball)
Attraction
Pulling
Power
The amount of work done for each unit of time.
Magnetism
The force or repulsion or attraction between poles of magnets.
Gravitation
the force that pulls all objects in the univers toward each other.
Force
Any push or pull that causes an object to move, stop or change direction.
Fulcrum
The point or support on which a lever turns.
Speed
A measure of distance an object moves in a given amount of time.
Distance
The extent of space between two points or things.