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Q.

The work done in dragging a stone of mass 100 kg up an inclined plane 1 m in 100 through a distance of 10 m is (take g = 9.8 m/s2)

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a

zero

b

9800 J

c

98 J

d

980 J

answer is D.

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Detailed Solution

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Slope of inclined plane, sin θ = 1100

Component of weight down the inclined plane

F = mg sin θ = 100×9.8× 1100 = 9.8 N

s = distance moved = 10 m

W = Fs = 9.8 ×10 = 98 J

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