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machines
facts and figures about machines
4
Science
8th Grade
02/28/2008

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Term
machine
Definition
A device that changes the amount of force exerted, the distance over which the force is exerted or the direction in which the force is exerted.
Term
mechanical advantage
Definition
a machine's mechanical advantage is the number of times a machine increase a force exerted on it
Term
mechanical advantage= output force
Input force
Definition
Term
Efficiency
Definition
output work
input work X 100%
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