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[" A smooth block is released at rest on...

[" A smooth block is released at rest on a "45^(@)" incline and then slides a distance d.The time taken to side "],[" is n times as much to slide on rough incline than on a smooth incline.The coefficient of friction is- "],[[" (1) "s=1(1)/(n^(2)),," (2) "s=sqrt(1(1)/(n^(2)))," (3) "kS^(-1)(1)/(n^(2))," (4) "k=sqrt(1(1)/(n^(2)))]]

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