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The uniform 15-kg bar is supported on the horizon- tal surface at A by a small roller of negligible mass. If the coefficient of

The uniform 15-kg bar is supported on the horizon- tal surface at A by a small roller of negligible mass. If the coefficient of kinetic friction between end B and the vertical surface is 0.30, calculate the initial acceleration of end A as the bar is released from rest in the position shown. y HA=0.30 40 2.4 m A Problem 6/97

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