Question

Main Menu Contents Grades Course Contents ... hw13 10.11T - Dynamics of Rotational Motion Rotational Inertia • Timer Notes Evaluate Calculate the moment of inertia of a skater given the following information. The 49.0-kg skater is approximated as a cylinder that has a 0.122-m radius. 0.365 kg MA2 Feedback Print Into You are correct. Your receipt nois 161-3863 Previous Tres The skater with arms extended is approximately a cylinder that is 43.0 kg, has a 0.122-m radius, and has two 0.960-m-long arms which are 3.00 kg each and extend straight out from the cylinder like rods rotated about their ends. 2.072 Submit Answer Incorrect. Tries 2/10 Previous Tres This discussion is closed. Send Feedback

Answer 1

net moment of inertia

= moment of inertia of cylindrical part + moment of inertia of two rod

= 0.5 M R^2 + 2 * (1/3) m L^2

= 0.5* 43* 0.122^2 + (2/3)* 3* 0.96^2

= 2.163 kg m^2

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