How do simple machines work?
Vocabulary
machine- any device that helps people do work by changing the way work is done
mechanical advantage- the number o times the machine multiples the input force
mechanical efficiency- a comparison of a machine's work output with the work input
lever- a simple machine that has a bar the pivots at a fixed point
fulcrum- the fixed point
wheel and axle- a simple machine that is made of a wheel connected to a smaller cylindrical object
pulley- a simple machine that has a grooved wheel that holds a rope of cable
inclined plane- a simple machine that is a straight, slanted surface
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