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10 terms

work, power, and simple machines chapt. 14

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scissors
An example of a first class lever.
Newton
A unit used to measure force.
shovel
An example of a third class lever.
pulley
A chain, belt or rope wrapped around a wheel.
work
A force exerted over a distance to move an object.
Joule
A unit used to measure work.
machine
A device that makes work easier.
wedge
An inclined plane that moves.
fulcrum
Place where a level is supported.
efficiency
comparison of work input to work output.