A man carrying a bag of total mass $25 k g$ climbs up to a height of $10 m$ in $50$ seconds. Calculate the power delivered by him on the bag.

50 J

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49 J

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25 J

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24.5 J

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Solution

The correct option is B 49 J
$P = W / t$
$W = F . d$
$F = m g$
$= 25 \times 10 = 250$
$W = 250 \times 10 = 2500 J$
$P = 2500 / 50 = 50 W$

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