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Chapter 3

8th Grade Physical Science

Power Rate at which work is done.
Transfer To move from one place to another.
Work Transfer of energy to an object by a force that makes an object move in the direction of the force.
Efficiency Ratio of output work to input work.
Mechanical Advantage Ratio of output force to input force.
Fulcrum Point at which a lever pivots, or rotates.
Inclined Plane Flat, sloped surface.
Lever Made up of a bar that pivots about a fixed point.
Pulley Grooved wheel with a rope or cable wrapped around it.
Screw Inclined plane wrapped around a cylinder.
Simple Machine A machine that does work using only one movement.
Wedge Sloped surface that moves.
Wheel and Axle Made up of a shaft, or axle, attached to the center of a wheel such that both rotate together.
Created by: gstubblefield