A differential pulley (chain hoist) is drawn in Fig. 7-6. Two toothed pulleys of radii r =
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A differential pulley (chain hoist) is drawn in Fig. 7-6. Two toothed pulleys of radii r = 10 cm and R = 11 cm are fastened together and turn on the same axle. A continuous chain passes over the smaller (10 cm) pulley, then around the movable pulley at the bottom, and finally around the 11-cm pulley. The operator exerts a downward force F on the chain to lift the load FW.
(a) Determine the IMA.
(b) What is the efficiency of the machine if an applied force of 50 N is required to lift a load of 700 N?
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a Suppose that the force F moves down a distance sufficient to cause the upper rigid system o...View the full answer
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