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Average and Instaneous Power

A man weighin...

Question

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 ht 0.2 m. If he takes 10 s to climb. Find his power.

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Solution

Total work done by man in covering 20 steps =mgh=80×10×0.2×20=3200J

So, Power(P) = $\frac{W o r k d o n e}{T i m e t a k e n} = \frac{3200}{10} = 320 W a t t$

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\begin{matrix} A man weighing 80 k g climbs a staircase carrying a 20 k g load. The staircase has 40 steps, each of 25 c m height. If he takes 20 seconds to climb, the work done is \end{matrix}

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