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San Diego State University Operations And Supply Chain Management Assignment Help - Force


Question - A Truck on a Drawbridge A loaded cement mixer drives onto an old drawbridge, where it stalls with its
center of gravity three-quarters of the way across the span. The truck driver radios for help, sets the
handbrake, and waits. Meanwhile, a boat approaches so the drawbridge is raised by means of a
cable attached to the end opposite the hinge (Fig. 11.42). The drawbridge is 40.0 m long and has a
mass of 12,000 kg; its center of gravity is at its midpoint. The cement mixer, with driver, has mass
30,000 kg. When the drawbridge has been raised to an angle of 30° above the horizontal, the cable
makes an angle of 700 with the surface of the bridge.
(a) What is the tension T in the cable when the drawbridge is held in this position?
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