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प्रश्न
A girl weighting 50 kg climbs up 60 steps each of 20 cm height in 5 minutes. Calculate the power developed.
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उत्तर
Given: mass = 50kg
Total height traveled = 60 × 20 cm
= 1200 cm
= 12m
g = 10 ms−2
time taken = 5 min
= 5 × 60 s
= 300 s
Work done = mgh
= 50 × 10 × 12
= 6000J
Power = `"work done"/"time taken"`
= `6000/300`
= 20 watt
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