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A stone tied to a string is rotated in a vertical plane. If mass of the stone is \( \mathrm{m} \), the length of the string is \( r \)
\( \mathrm{P} \)
and the linear speed of the stone is \( \mathrm{v} \) when the stone
W
is at its lowest point then the tension in the string at the lowest point will be :
(1) \( \frac{\mathrm{mv}^{2}}{\mathrm{r}}+\mathrm{mg} \)
(2) \( \frac{m v^{2}}{r}-m g \)
(3) \( \frac{m v^{2}}{r} \)
(4) \( \mathrm{mg} \)
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