1. Tardigrade
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  3. Physics
  4. A man weighing 60 kg climbs up a staircase carrying a load of 20 kg on his head. The staircase has 20 steps each of height 0.2 m . If he takes 10 s to climb, find his power.

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Q. A man weighing $ 60 \,kg $ climbs up a staircase carrying a load of $ 20 \,kg $ on his head. The staircase has $ 20 $ steps each of height $ 0.2\, m $ . If he takes $ 10\, s $ to climb, find his power.

Work, Energy and Power

Solution:

Here, $ m = 60 + 20 = 80 \,kg $
$ h = 20 \times 0.2 = 4\, m $ , $ g = 9.8 \,ms^{-2} $ , $ t = 10\, s $
$ P = \frac{W}{t}= \frac{mgh}{t} $
$ = \frac{80 \times 9.8 \times 4}{10} = \frac{3136}{10} $
$ = 313.6\,W $