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Q.

A piece of ice of mass 50 kg is pushed with a velocity of 5 m/s along a horizontal surface. As a result of friction between the piece and the surface, the piece stops aftertravelling 25 m; the ice melted in this process is:

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a

50 kg

b

50 g

c

7.86 g

d

1.86 g

answer is D.

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Detailed Solution

Ice melted =12MV2Lf=12(50)(5)280×4.2×1000=0.00186 kg=1.86 g.
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