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A block moving on a surface with velocit...

A block moving on a surface with velocity `20 m//s` comes to rest because of surface friction over a distance of 40 m. Taking `(g=10 m//s^2)`, the coefficient of dynamic friction is :

A

0.5

B

0.3

C

0.2

D

0.1

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The correct Answer is:
A
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