Problem

2. A table tennis bat is made up of a circular disk (diameter =0.20 m, m=0.075 kg ) and a handle (model as a circular cylinder) of diameter 0.015 m, length =0.10 m, and mass =0.05 kg. Find its moment of inertia about its center of mass.

Answer

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Answer

Find the total moment of inertia: Itotal=Idisk+Ihandle

Steps

Step 1 :Find the moment of inertia of the disk: Idisk=12mdiskrdisk2=12(0.075)(0.10)2

Step 2 :Find the moment of inertia of the handle: Ihandle=14mhandledhandle2+112mhandlehhandle2=14(0.05)(0.015)2+112(0.05)(0.10)2

Step 3 :Find the total moment of inertia: Itotal=Idisk+Ihandle

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