A Girl of Mass 50 Kg Runs up a Flight of 40 Steps in 20 Seconds. If Each Step in 20 Cm High, Calculate the Power Developed by the Girl. (G= 10 Ms-2). - Physics
A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms-2).
Given, mass = 50kg
Total height traveled = 40 x 20 cm = 800 cm = 8 m
g = 10ms-2
time taken = 20s
work done = mgh = 50 x 10 x 8 = 4000 J
power = `"work done"/"time taken" = 4000/20 = 200 "watt"`
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