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Work

A block of we...

Question

A block of weight $W$ is pulled a distance $l$ along a horizontal table. The work done by the weight is

W l

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W g l

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W l / g

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zero

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Solution

The correct option is B zero
Here the weight will act in a vertically downward direction but the displacement is in the horizontal direction. They are perpendicular to each other. Since, there is no displacement in the direction of the weight W, work done by the weight (W) will be zero.
Hence the correct answer is option $D$ .

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