previous10 of 31 next » Problem 11.56 Part A A student sits at rest on a piano s

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previous10 of 31 next » Problem 11.56 Part A A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.4 kg m2 .Asecond student tosses a 1.1 kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a distance of 0.40 m from the axis of rotation. What is the resulting angular speed of the student and the stool? Express your answer using two significant figures. Azo rad/s Submit My Answers Give Up Incorrect, One attempt remaining; Try Agairn Provide Feedback Continue

Explanation / Answer

Applying angular momentum conseraton for the system,

Li = Lf

(4.4 x 0) + (1.1 x 2.9 x 0.40) = (4.4 + (1.1 x 0.4^2) ) wf

1.276 = (4.576) wf

wf = 0.28 rad/s .......Ans

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