A charge Q$1=1\mathrm{.}2$ mC moves with a speed of v$1=2\mathrm{.}5$ ms$-1$ perpendicular to a uniform magnetic field. The charge experiences a magnetic force of F$1=8\mathrm{.}5\backslash$times $10-2$ N$.$ A second charge Q$2=2$ mC travels at an angle of $25$ with respect to the same magnetic field and experiences a force of F$2=1\mathrm{.}1\backslash$times $10-3$ N$.$ What is the speed of Q$2?$