Question: The maximum and minimum tensions in the string whirling in a circle of radius 2.5 m are in the ratio 5:3,then its velocity is
(A) \sqrt{98}ms^{-1}
(B) 7ms^{-1}
(C) \sqrt{490}ms^{-1}
(D) 4.9ms^{-1}
Answer: option (A)
Solution:
then its velocity is