A man weighing 80 kg climbs a staircase ...

A man weighing `80 kg` climbs a staircase carrying a `20 kg` load. The staircase has `40` steps, each of `25 cm` height. If he takes `20` seconds to climb, the work done is

9800 J

490 J

`98 xx 10^(5) J`

7840 J

Text Solution

Verified by Experts

The correct Answer is:

`W = vec F.vec S = FS = (M + m)g(nxx h_("each step"))`

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