Q

Find the average power required to lift an 80 kg object through 40 m in 50 seconds. (g = 10 m/s²)

RRB Group D 18/09/2018 / Shift-III 2018
✓ Answer: B 640 J/s
P = mgh/t = 80 × 10 × 40/50 = 640 J/s.
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