A block of mass m is released on the top...

A block of mass m is released on the top of a smooth inclined plane of length x and inclination `theta` as shown in figure. Horizontal surface is rough. If block comes to rest after moving a distabce d on the horizontal surface, then coefficient of friction between block and surface is :-

`(xsintheta)/(2d)`

`(xcostheta)/(2d)`

`(xsintheta)/(d)`

`(xcostheta)/(d)`

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