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Chapter 5 vocab

TermDefinition
Work A transfer of energy that occurs when a force makes an object move.
Power The amount of work done in a second.
Machine A device that makes doing work easier.
Input force Force that is applied to a machine.
Output force Force applied by a machine.
Mechanical advantage The ratio of the output force to the input force.
Efficiency A measure of how much work put into a machine is converted into useful output work.
Simple machine A machine that does work with one movement of the machine.
Lever A bar that is free to pivot or or turns around a fixed point.
Pulley A grooved wheel with a rope running along the groove.
Wheel and axle Consists of a shaft or axle attached to the center of a larger wheel.
Inclined plane A sloping surface used to reduce the amount of work done to an object.
Screw An inclined plane wrapped around a cylindrical post.
Wedge An inclined plane with 2 sloping sides.
Compound machine When one or more simple machines that work together.
Created by: ggalyean
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