Stone tied at one end of light string is whirled \( \mathrm{P} \) r...

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Stone tied at one end of light string is whirled
\( \mathrm{P} \) round a vertical circle. If the difference between

W the maximum and minimum tension experienced by the string wire is \( 2 \mathrm{~kg} \) wt, then the mass of the stone must be:
(1) \( 1 \mathrm{~kg} \)
(2) \( 6 \mathrm{~kg} \)
(3) \( 1 / 3 \mathrm{~kg} \)
(4) \( 2 \mathrm{~kg} \)
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