A boy walks 100 m on a levelled road carrying a load of 5kg on his back. What is the work done by the boy against the gravitational force? ( $g = 10 m / s^{2}$ )

500 J

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5 J

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0.5 J

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O J

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Solution

The correct option is D O J
As, W $= m g h$
Since $h = 0$ so, W $= 0$
Hence, option D is correct.

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