1. The problem statement, all variables and given/known data A proton moves perpendicularly to a magnetic field that has a magnitude of 6.48x10-2T. A magnetic force of 7.16x10-14N is acting on it. If the proton moves a total distance of 0.500m in the magnetic field, how long does it take for the proton to move across the magnetic field? If the magnetic force is directed north and the magnetic field is directed upward, what was the proton's velocity? 2. Relevant equations F=ma F= BIL (Those are what the teacher gave us. He said that's all we need.) (I added:) V2 = 2a*change in x (sorry, not sure how to make a delta) 3. The attempt at a solution After chugging through those equations, I got a time of 1.528x10-7. I'm not sure how to figure how the second part - the directions - but I think it has something to do with the right hand rule. Am I right? (For both the time and directions?) Thanks for taking the time to at least read this over. Please pardon the lack of LaTeX, I'm not too familiar with it. If you can help at all, even point me in the right direction, I'll appreciate it greatly.