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A smooth block is released from rest on a 45o inclined plane and it slides a distance ‘d’. The time taken to slide is n times that on a smooth inclined plane. The coefficient of friction

a
μk=1−1n2
b
μk=1−1n2
c
μk=11−n2
d
μk=11−n2

detailed solution

Correct option is A

μk=tan⁡θ1−1n2

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Two blocks of mass M and m are connected with a string which passes over a smooth pulley as shown in fig. The mass M is placed on a rough 

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