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A mass of 10kg is whirled in a horizonta...

A mass of 10kg is whirled in a horizontal circle by means of a string at an initial speed of 5 r.p.m. Keeping the radius constant , the tension in the string is quadrupled. The new speed is nearly

A

14 r.p.m

B

10 r.p.m

C

2.25 r.p.m

D

7 r.p.m

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The correct Answer is:
B
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