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A boy of mass 55kg rus up a filight of 4...

A boy of mass 55kg rus up a filight of 40 stairs, each measuring 0.15m Calculate the work done by the boy.

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The correct Answer is:
C
`W = Fs =(550 N) (6m) = 3300 J (F = 55 kg wt = 550 N, s = 40 xx 0.15m = 6m)`
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