Question: The gear train shown operates in a horizontal plane at a steady speed and receives 6 hp from a motor at A to move rack

The gear train shown operates in a horizontal plane at a steady speed and receives 6 hp from a motor at A to move rack D against a 4500-pound load L. At what speed will the rack move if gears A, B, and C have pitch diameters dA = 12 in., dB = 24 in., and dC = 12 in.? Gear C is keyed to the same shaft as gear B and friction in the bearings is negligible.

L B A C.

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