Question: The 7-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

The 7-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 2.95m/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 l=635mm. Assume =31. Answer: Ufriction=Nm

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