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Chap 5 Vocab

Vocabulary

TermDefinition
Work Transfer of energy that occurs when a force makes an object move.
Power amount of work done in one second.
Machine device that makes doing work easier.
Input Force Force applied to the machine.
Output Force Force applied by the machine.
Mechanical Advantage Ratio of the output force to the input force.
Efficiency Measure of how much of the work put into a machine is changed into useful output work by the machine.q
Simple Machine machine that does work with only one movement of the machine.
Lever 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 & Axel 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 form a Compound Machine.
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