A mass of 2 kg is whirle ‘d in a horizontal circle by means of a string at an initial speed of 5 revolutions per minute. Keeping the radius constant, the tension in the string is double. The new speed is nearly

Question: A mass of 2 kg is whirle ‘d in a horizontal circle by means of a string at an initial speed of 5 revolutions per minute. Keeping the radius constant, the tension in the string is double. The new speed is nearly

(A) 2.25 rpm

(B) 7 rpm

(C) 10 rpm

(D) 14 rpm

Answer: option(B)

solution:

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