Question: For the wheel described in Problem 16.22, compute the force exerted on the paddle when the wheel rotates at 40 rpm. In Problem Shown in

For the wheel described in Problem 16.22, compute the force exerted on the paddle when the wheel rotates at 40 rpm.

In Problem

Shown in Fig. 16.20 is a small decorative wheel fitted with flat paddles so the wheel turns about its axis when acted on by a blown stream of air. Assuming that all the air in a 15-mm-diameter stream moving at 0.35 m/s strikes one paddle and is deflected by it at right angles, compute the force exerted on the wheel initially when it is stationary. The air has a density of 1.20 kg/m³.

Paddle 15-mm diameter Air stream 75 mm Section A-A

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