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Q.

A string is wrapped several times round a solid cylinder. If the cylinder is released by holding the free end of the string to move down, then the acceleration of that cylinder is

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a

$\frac{g}{3}$

b

$\frac{g}{2}$

c

$\frac{3 g}{2}$

d

$\frac{2 g}{3}$

answer is D.

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Detailed Solution

$m g - T = m a; T .r . = I α; a = α r$

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