A mass of \( 2 \mathrm{~kg} \) is whirled in a horizontal circle by...

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A mass of \( 2 \mathrm{~kg} \) is whirled in a horizontal circle by means of a string at an initial speed of 5 r.p.m.
\( \mathrm{P} \) Keeping the radius constant the tension in the string is

W doubled. The new speed is nearly:-
(1) 7 r.p.m.
(2) 14 r.p.m.
(3) 10 r.p.m.
(4) 20 r.p.m.
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