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A block A of weight W slide down an incl...

A block A of weight `W` slide down an inclined plane S of slope `37^(@)`at a constant velocity, while the plank B also of weight `W` rests on top of `A`. The plank B is attached by a cord to the top of plane .The coefficient of kinetic friction `mu` is the same between the surface A and B and between S and A Determine the value of `1//mu`

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