# A stone of mass 𝑚 is tied to a string and is moved in a vertical circle of radius 𝑟 making 𝑛 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒. The total tension in the string when the stone is at its lowest point is

Question : A stone of mass 𝑚 is tied to a string and is moved in a vertical circle of radius 𝑟 making 𝑛 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒. The total tension in the string when the stone is at its lowest point is

(A) 𝑚𝑔

(B) 𝑚(𝑔 +$\pi nr^{2}$

(C) 𝑚(𝑔 + 𝜋𝑛𝑟)

(D) 𝑚{𝑔 +$\pi ^{2}\pi ^{2}\dfrac{r}{900}$}