A uniform disc of mass \( M \) and radius \( R \) is mounted on an ...

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A uniform disc of mass \( M \) and radius \( R \) is mounted on an axle supported in frictionless
\( \mathrm{P} \) bearings. A light cord is wrapped around the rim

W of the disc and a steady downward pull \( T \) is exerted on the cord. The angular acceleration of the disc is:
(1) \( \frac{T}{M R} \)
(2) \( \frac{M R}{T} \)
(3) \( \frac{2 T}{M R} \)
(4) \( \frac{M R}{2 T} \)
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