Question

a girl of mass 50kg runs up a flight of stairs of 20 steps in 10s. lf each step is 25cm high, determune the power developed by the girl

Answer 1

Answer:

375watt

Explanation:

Look figure

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Answer 2

                         Answer

>>Height = 20 * 25 = 500 cm = 5 m.

>>Mass = 50 kg.

>>let,g = 10 m/s^2       {gravity due to earth of free fall}

>>Time = 10 seconds

>>Power = ?

                     >>Power = Mass * Height * g / Time

                                     = 50 * 5 * 10 / 10

                                     = 2500 / 10 = 250 J S^-1

I HOPE IT HELPS.

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