Physics
A boy of mass 40kg climbs up the stairs and reaches the roof at a height 8m in 5s. Calculate:
(i) The force of gravity acting on the boy,
(ii)The work done by him against gravity,
(iii)The power spent by the boy.
Take g = 10 ms-2
Work, Energy & Power
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Answer
Given,
m = 40 kg
h = 8 m
t = 5 s
(i) Force of gravity acting on the boy
(ii) Work done against gravity
(iii)
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