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The 12-kg bar is released from rest while in the position shown and its end rollers travel in the vertical-plane slot shown. If the

The 12-kg bar is released from rest while in the position shown and its end rollers travel in the vertical-plane slot shown. If the speed of roller A is 2.99 m/s as it passes point C, determine the work done by friction on the system over this portion of the motion. The bar has a length /= 660 mm. Assume 0-33 A 1 B Answer: Ufriction i 2.65 N-m

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