A force of 50N is applied to the end of a lever to lift a rock that is 350N . what is the mechanical advantage of a lever?

MA  = 7

Explanation:

Mechanical Advantage = Load/Effort

From the question,

Load  = 350N

Effort applied = 50N

Mechanical Advantage = 350N/50N

Mechanical Advantage = 7

Hence the mechanical advantage is 7

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small = small current large mag large current