Q

A 50 kg boy climbs 40 stairs in 10 seconds. Each stair is 15 cm high. Find his power. (g = 10 m/s²)

RRB Group D 23/10/2018 / Shift-I 2018
✓ Answer: C 300 W
h = 6 m. P = mgh/t = 50 × 10 × 6/10 = 300 W.
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