A mass \( m \) is supported by a massless string wound round a unif...

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A mass \( m \) is supported by a massless string wound round a uniform cylinder of mass \( m \) and radius \( \mathrm{R} \). On releasing the mass from rest, it will fall with acceleration-
(1) \( g \)
(2) \( \mathrm{g} / 2 \)
(3) \( \mathrm{g} / 3 \)
(4) \( 2 g / 3 \)
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