A sphere is accelerated upwards by a cord whose breaking strength is four times of its weight. T...

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A sphere is accelerated upwards by a cord whose breaking strength is four times of its weight. The maximum acceleration with which the sphere can move up without breaking the cord is
[RPMT 2005]
(a) \( g \)
(b) \( 3 g \)
(c) \( 2 g \)
(d) \( 4 g \)
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