A stone of mass 900 g is tied to a string and moved in a vertical circle of radius 1 m making 10 rpm. The tension in the string, when the stone is at…

A stone of mass $\displaystyle 900$ g is tied to a string and moved in a vertical circle of radius $\displaystyle 1$ m making $\displaystyle 10$ rpm . The tension in the string, when the stone is at the lowest point is (if $\displaystyle \pi^2=9.8$ and $\displaystyle \mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^2$ ):