A particle with a charge of $-1.24 \times 10^{-8} \mathrm{C}$ is moving with instantaneous velocity $\vec{V}=\left(4.19 \times 10^{4}\right) \vec{i}+\left(-3.85 \times 10^{4}\right) \vec{j} \mathrm{~ms}^{-1}$. What is the force exerted on this particle by a magnetic field $\vec{\mathrm{B}}=(1.40) \vec{\mathrm{i}}T$.