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Science Vocab Ch. 3

Work and Simple Machines; Lessons 1 - 3

TermDefinition
Work The transfer of energy to an object by a force that makes an object move in the direction of the force. It is only being done while the force is applied to the object.
Power The rate at which work is done.
Mechanical Advantage A machine's ... is the ratio of a machine's output force produced to the input force applied.
Efficiency The ... of a machine is the ratio of the output work to the input work.
Simple Machines Do work using only one movement.
Lever A simple machine made up of a bar that pivots, or rotates, about a fixed point.
Fulcrum The point about which a lever pivots.
Wheel and Axle An axle attached to the center of a wheel and both rotate together.
Inclined Plane A ramp, or ..., is a flat, sloped surface.
Wedge A sloped surface that moves.
Screw An inclined plane wrapped around a cylinder.
Pulley A simple machine that is a grooved wheel with a rope or a cable wrapped around it.
Created by: stemljos4017