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Question: The cable cars in San Francisco are pulled along their tracks by an underground steel cable that moves along at 9.6 mph. The cable is driven by large motors at a central power station and extends, via an intricate pulley arrangement, for several miles beneath the city streets. The length of a cable stretches by up to 100 ft during its lifetime. To keep the tension constant, the cable passes around a 1.5-m-diameter "tensioning pulley" that rolls back and forth on rails, as shown in the figure below. A w = 2315 kg block is attached to the tensioning pulley's cart, via a rope and pulley, and is suspended in a deep hole.
Part A: What is the tension in the cable car's cable?
I want help to find the tension in the cable car's cable.
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