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A 60 kg perso...

Question

A 60 kg person climb the stairs of height 20m in 10 minutes. Calculate the power delivered.

20 W

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10 W

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30 W

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60 W

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Solution

The correct option is A
20 W

We know, power = $\frac{w o r k d o n e}{t i m e}$ ;

= $\frac{m g h}{t i m e}$

= 60 × 10 × $\frac{20}{10 \times 60}$ ;

= 20 Nm/second

= 20 watt.

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