When an air jet of 1-in.-diameter strikes a series of blades on a turbine rotor, the absolute velocities are as shown. If the air is assumed to have a constant specific weight of \(0.08 \mathrm{lb} / \mathrm{ft}^{3}\), what is the force on the turbine rotor? How much horsepower is transferred to the rotor? What must be the velocity of the blade system?

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500 ft/s 45 P10.75 u 400 ft/s 90%