Question

A string breaks if its tension exceeds 10 newton. A stone of mass 250 mg tied to this string of length 10cm is rotated in a horizontal circle. The maximum angular velocity of rotation can be: 

(A) 20 rad/s 

(B) 40 rad/s 

(C) 100 rad/s 

(D) 200 rad/s

Answer 1

Correct option is (A) 20 rad/s

Max Tension the string can sustain

T_max = 10 N.

Mass of the stone = 250 gm = 1/4 kg

Length of string = 10 cm = 0.1 m

Answer 2

Correct answer is (A) 20 rad/s