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PS Chapter 5

Vocab

QuestionAnswer
Work The transfer of energy.
Power The amount of work done in one second.
Machine A device that makes doing work easier.
Input Force The force that is applied to the machine.
Output Force The force applied by the machine.
Mechanical Advantage The ratio of the output force to the input force.
Efficiency The measure of how much of the work put into a machine is changed into useful output work by the machine.
Simple Machine A machine that does work with only one movement of the machine.
Lever A bar that is free to pivot or turn around a fixed point.
Pulley A grooved wheel with a rope, chain, or cable running along the groove.
Wheel and Axle A simple machine consisting of a shaft or axle attached to the center of a larger wheel, so that the wheel and axle rotate together.
Inclined Plane A sloping surface, such as a ramp that reduces the amount of force required to do work.
Screw An inclined plane wrapped in a spiral around a cylindrical post.
Wedge An inclined plane with one or two sloping sides.
Compound Machine Two or more simple machines that operate together.
Created by: caseygoodman
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