A $7-$year$-$old boy makes a toy from a stone of mass $3188\mathrm{.}5g$ and attaches it to one end of a

string of length $749\mathrm{.}1cm$ with the other end in his hands. He spins around clockwise on his

left leg, giving the stone a tangential velocity of $5\mathrm{.}5\frac{m}{s}.$ Determine the tension $($in Newtown$)$

that must exist in the string.

Assume the stone traces out a circle of radius $749\mathrm{.}1cm.$