Question

The breaking tension of a string is 50 N. A body of mass 1 kg is tied to one end of a 1 m long string and whirled in a horizontal circle. The maximum speed of the body should be

(A) 5√2 m/s

(B) 10 m/s

(C) 7.5 m/s

(D) 5 m/s

Answer 1

Answer is (A) 5√2 m/s

Using, v² = \(\frac{Tr} {m}\)

Breaking tension T = \( \frac{mv^2} {r}\)

(r = length of the string)