How much work is done by the men in lifting the box ?

250 J

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2500 J

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62.5 J

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625 J

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Solution

The correct option is B 2500 J
Mass of the box $m = 250$ kg
Force exerted by men $F = m g = 250 k g \times 10 (g = 10 m s^{- 2})$
Thus $F = 2500 N$
Displacement of the box $s = 1 m$
So work done $W = F . s = 2500 \times 1$
$⟹ W = 2500 J$

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Similar questions

(g = 10 m s^{- 2})

(g = 10 m s^{- 2})

(g = 10 m s^{- 2})

In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.

(a) How much work does he do in lifting one box ?

(b) How much energy is transferred when one box is lifted ?

250 c a l

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