Modern wind turbines are larger than they appear, and despite their apparently l

Question

Modern wind turbines are larger than they appear, and despite their apparently lazy motion, the speed of the blades tips can be quite high-many times higher than the wind speed. A turbine has blades 56 m long that spin at 14 rpm .

At the tip of a blade, what is the speed?

Express your answer to two significant figures and include the appropriate units.

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Part B

At the tip of a blade, what is the centripetal acceleration?

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

v = w*r

14 rpm = 14 * 2pi /60 rad/s

r = 56 m

v = 82.1 m/s = 82 m/s

part b )

a = w^2*r

a = 120.365 m/s^2

a = 120 m/s^2

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