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

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On horizontal smooth surface a mass of \( 2 \mathrm{~kg} \) is whirled in a horizontal circle by means of a string at
\( \mathrm{P} \)
an initial angular speed of 5 revolutions per minute. Keeping the radius constant the tension in the string
W
is doubled. The new angular speed is nearly.
(1) \( 14 \mathrm{rpm} \)
(2) \( 10 \mathrm{rpm} \)
(3) \( 2.25 \mathrm{rpm} \)
(4) \( 7 \mathrm{rpm} \)


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