A boy mass 40 kg climbs up the stairs and reaches the roof at a height – InterviewSolution

InterviewSolution

1.	A boy mass 40 kg climbs up the stairs and reaches the roof at a height 8 m in 5 s. Calculate : (i)the force of gravity acting the boy . (ii) the work done by against the force of gravity . (iii)the power spent by the boy . (Take g=10 m S^(-2))
Answer» Solution :(i) 400 N (II)3200 J (iii) 640 W

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