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What is difference between efficiency of machine and mechanical advantage?

 ​machine make our work easy.In machine we have to click only buttons or swichs and that is not hard for us,this are advantage of machine.
Things that done with our human power is known as machanical force. Advantage of this is,thinng can done carefully with perfect measuement.

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Mechanical advantage is a measure of how much your force is multiplied,efficiency is a measure of how much of the work you do actually goes to moving the thing you're trying to move. ... Adding more pulleys may increase the mechanical advantage, but it also increases the amount of extra stuff you're moving.
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