Part A At the tip of a blade, what is the speed? Express your answer to two sign

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Part A

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.

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Figure 1 of 1

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 58 m long that spin at 12 rpm .
(Figure 1)

You may want to review ( pages 161 - 163) .

Part A

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

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

v =

SubmitMy AnswersGive Up

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.

ar =

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Provide FeedbackContinue

Figure 1 of 1

Explanation / Answer

Given,

Radius, r = 58 m

Angular speed, w = 12 rpm

v = w x r

12 rpm = 12 x (2pi /60) rad/s

v = 1.26 x 58 = 72.88 m/s

b ) a = w2 x r = 91.84 m/s2

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