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Chapter 5 Vocab.

TermDefinition
Work The transfer of energy that occurs when a force makes an object move.
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 A 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 Simple machine that consists of a shaft or axle attached to the center of a larger wheel, so that the shaft and the wheel rotate together.
Inclined Plane Simple machine that consists of a sloping surface, such as a ramp, that reduces the amount of force needed to left something by increasing the distance over which the force is applied.
Screw Simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post.
Wedge Simple machine that is an inclined plane with one or two sloping sides.
Compound Machine Machine that is a combination of two or more simple machines.
Created by: Hilda_Munoz
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