prob_008 (2) - 8. REASONING AND SOLUTION The centripetal...

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8. REASONING AND SOLUTION The centripetal acceleration for any point on the blade a distance r from center of the circle, according to Equation 5.2, is a c = v 2 / r . From Equation 5.1, we know that vr T = 2 π / where T is the period of the motion. Combining these two equations, we obtain a rT r r T c == (/ ) 2 4 2 2 2 a. Since the turbine blades rotate at 617 rev/s, all points on the blades rotate with a period of T = (1/617) s = 1.62 × 10 –3 s. Therefore, for a point with
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