Question

A crowbar of length 10 m has a fulcrum at a distance of 4 m from one end.Calculate the effort required to lift a load of 120N. ( Draw the lever and find the mechanical advantage).​

Answer 1

Explanation:

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Answer 2

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Given:-

Distance of fulcrum ''d''=4m

Length"l"=10m

Solution:-

force1 x distance1=force2 x distance2

120N x 4 m=F x(10-4)

F=480/6=80 N

Thus the effort required to lift the load of 120 N is 80N.