www.saplinglearning.com, se c Chegg Study l Guided Sol c Two Thin Disks Are Atta

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www.saplinglearning.com, se c Chegg Study l Guided Sol c Two Thin Disks Are Attach University of Pittsburgh digg Drake Releases New 'Hotl WWW.saplinglearning com 2222847 11/5/2015 12:00 AM A 6.8/10 /4/2015 07:17 PM Gradebook Attempts Score Print Calculator Periodic Table 93 Question 5 of 10 95 00 Two thin disks are attached as shown to the right. The angle 0 30.8°, and the masses and radii of the disks are listed in the table below. 90 Disk radius (am) Mass (kg) A 19.8 0.836 B 8.70 0.383 00 What is the moment of inertia of this composite object about an axis perpendicular to the screen, through point p? 00 Number 00 kg m Tools Previous 3 Give Up & View Solution Check Answer Next IExit Hint Ask me anything Austi Resources O Assignment Information Available From Not Se Due Date 11/5/2015 12 C Late submissions Allowed with 2 points possibl per day until 11/09/2015 12 Points Possible 10 Grade Category: Graded Description: Policies: My Homework You can check your answers. You can view solutions when you c give up on any question You have ten attempts per questio You lose 5% of the points available answer in your question for each ir attempt at that answer. eTextbook O Help With This Topic 7:57 PM ENG /4/2015

Explanation / Answer

r1 = R = 19.8 cm

r2 = sqrt(rA^2 + (rA+rB)^2 - 2*rA8rB*cos(180-30.8)

r2 = sqrt(19.8^2+(19.8+8.7)^2-(2*19.8*8.7*cos(180-30.8))

r2 = 38.7 cm

I = 0.5*mA*rA^2 + mA*r1^2 + (2/5)*mB*rB^2 + mB*r2^2

I = (0.5*0.836*0.198^2)+(0.836*0.198^2)+(0.5*0.383*0.087^2)+(0.383*0.387^2)

I = 0.11 kg m^2

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