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A bob of mass 10 kg is attached to a wire 0.3 m long. Its breaking stress is  4.8×107 N/m2 . The area of cross-section of the wire is 10-6 m2 . What is the maximum angular velocity with which it can be rotated in a horizontal circle?


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8 rad/s
4 rad/s
2 rad/s
1 rad/s

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detailed solution

Correct option is B

FA=mw2lA=4.8×10+7w2=4.8×10+7×10-610×0.3=16W = 4 rad/sec

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