A uniform sphere of weight W and radius 3 m is being held by a string of length 2m.attached to a frictionless wall as shown in the t figure. The tension in the string will be:

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5W4

15 W4

15 W16

none of these

answer is A.

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Detailed Solution

FBD of sphere:W = T sin θand cos θ = 35 ⇒ θ = 530⇒ T = Wsin 530 = 54W

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