The power (P) of an engine lifting a mass of 100 kg up to a height of 10m in 1 min is [J&K CET 2013)

The power (P) of an engine lifting a mass of 100 kg up to a height of 10m in 1 min is [J&K CET 2013)

A
163.3 W
B
9800 W
C
10000 W
D
5000 W

Solution:

$Power = \frac{Work done}{Time}$

Work done $= m g h = 100 \times 9.8 \times 10$

Time = 1 min = 60 s

$∴ P = \frac{100 \times 9.8 \times 10}{60} = 163.3 W$

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