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A certain drawbridge can be modeled as a uniform 15,000 N bar, 12.0 m long, pivoted about is lower and. When this bridge is raised to an angle of 60.0° above the horizontal, the cable holding it suddenly breaks a lowing the bridge to fall. At the instant after the cable breaks, (a) what is the torque on this bridge about the pivot and (b) at what rate is its
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