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The 15-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 3.23 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 1 = 775 mm.
Assume 8 = 34⁰
Answer: Utriction
B
C
N-m

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