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of Oklahoma and Oklahoma State University are currently working on a
long term project to explore the benefits of utilizing wind power as
a renewable energy source for the state of Oklahoma. Wind
comes in at a mass flow rate of 150 kg/s, hits the blades of the windmill
horizontally at 20 m/s, and goes out at an angle of 60o at
50 m/s (as shown in the figure). The windmill is rotating at a speed of 2.5 rad/s. Determine the power generated by the windmill. The inner radius, r1, and outer radius, r2, are 30 m and 32 m, respectively.