Problem 8.60 A wheel consists of 20 thin spokes, each with mass 0.055 kg , attac

Question

Problem 8.60

A wheel consists of 20 thin spokes, each with mass 0.055 kg , attached to a rim of mass 4.6 kg and radius 0.90 m .

Part A

Find its rotational inertia.

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

6.7kgm2

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General Physics I

Problem 8.60

A wheel consists of 20 thin spokes, each with mass 0.055 kg , attached to a rim of mass 4.6 kg and radius 0.90 m .

Part A

Find its rotational inertia.

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

6.7kgm2

SubmitMy AnswersGive Up

Incorrect; Try Again; 15 attempts remaining; no points deducted

One or more of the units you entered is not recognized. Click help to view a list of recognized units.

Provide FeedbackContinue

Explanation / Answer

total moment of inertia (I) = Moment of inertia of spokes + moment of inertia of rim

I = 20*(1/3)*m*R^2 + (M*R^2)

I = (20*(1/3)*0.055*0.9*0.9) + (4.6*0.9*0.9) = 4.023 kg *m^2

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