An operator makes $18$ complete cycles in $20$ s interval using the hand pump shown in Figure below. Each complete cycle consists of two pump strokes $($intake and power$).$ The pump has a piston of diameter $28$ mm and the load cylinder has a piston of diameter $135$ mm $.$ The average hand force is $120$ N during each power stroke.

How much load can be lifted $($in N$)?$

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How many cycles are required to lift the load by $500$ mm $,$ assuming no oil leakage? The pump piston has $20$ mm stroke. Choose... $-1^{}$ What is the output power $($in W$)$ assuming $80\%$ efficiency?

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