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A lever is an example of a simple machine as shown, a 120 Kg boulder is...

A lever is an example of a simple machine as shown, a 120 Kg boulder is being lifted a
distance of 0.25 m when the person pushes downward with a force of 360 N for a distance
of 0.88 m.

(a) Find a MA of the lever described
(b) Find the efficiency of the lever described

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