, , A block of mass m is released on the top of a smooth inclined plane of length x and inclinati...

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, , A block of mass m is released on the top of a smooth inclined plane of length x and inclination θ as shown in figure. Horizontal surface is rough. If block comes to rest after moving a distance d on the horizontal surface, then coefficient of friction between block and surface is
(2) x cosθ/2 d
(1) x sinθ/2 d
(4) x cosθ/d,

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