Answer to Question #305873 in Mechanics | Relativity for Quân Jason

Question #305873

Three identical balls with masses of M, 2M, and 3M are fastened to a massless rod of length L as shown. The rotational inertia about the left end of the rod is ?

Please help. Thank you


1
Expert's answer
2022-03-07T07:16:46-0500

We know that

I=mr2I=mr^2

I=I1+I2+I3I=I_1+I_2+I_3


I=(3M)×02+2M×(L2)2+ML2I=(3M)\times0^2+2M\times(\frac{L}{2})^2+ML^2

I=32ML2I=\frac{3}{2}ML^2


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