# Magnetic Force Exerted on Particle

Sorry for slightly disregarding the proper format but I'm really quite lost so I can abide by what is expected. However I will be detailed

Question is: A particle with a mass of 6.64e-27 kg and a charge of +3.2e-19 C is accelerated from rest through a potential difference of 2.45e6 V. The particle then enters a uniform 1.6-T magnetic field. If the particle's velocity if perpendicular to the magnetic field at all times, what is the magnitude of the magnetic force exerted on the particle?

I'm unsure how to start this problem but I know the answer is 7.87e-12 N.

Any help is greatly appreciated.

Thanks!