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Q.

A block of mass 2kg is given a push on a horizontal surface so that it starts sliding on the surface. Its velocity versus time graph is as shown. The coefficient of friction between the surface and body is (g=10ms-2)

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a

0.3

b

0.2

c

0.5

d

0.4

answer is C.

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Detailed Solution

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a=−2ms−2

 but a=−μg⇒μ=210

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