32. A uniform circular disk of mass M and radius r is connected by a light cord to a fixed pivot on a smooth horizontal table. The center of the disk moves at a constant distance R from the pivot and undergoes uniform circular motion with tangential speed v. The magnitude of the disk's angular momentum about the pivot is
(A) MRv
(B)
(C)
(D)
(E) M(R² + r²/2)(v/R)

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#7606881
這題在考什麼 這題考的是剛體角動量的合成...
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