Smith weighing 30 kg carries a load of 10 kg and travels a distance of 100 m in a straight line.

Saloni weighing 40 kg goes up 100 m by climbing steps.

The work done by Smith and Saloni of them respectively will be

40000J and 40000J

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40000J and 4000 J

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4000 J and 40000J

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0 J and 40000J

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Solution

The correct option is D
0 J and 40000J

Work done by Smith is zero. Because load is perpendicular to the displacement.

Saloni does work against the gravitational force.

Total work done by Saloni in climbing the steps = mgh = 40 × 10 × 100 = 40,000J

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