1. The problem statement, all variables and given/known data A proton moving with constant velocity enters a region containing a constant magnetic field that is directed along the z-axis at (x,y) = (0,0) as shown. The magnetic field extends for a distance D in the x-direction. The proton leaves the field having a velocity vector (Vx, Vy). q = 1.6*10^-19C m = 1.67*10^-27kg D = 0.56m Vx = 4.9*10^5m/s Vy = 1.9*10^5m/s a. What is the V, the magnitude of the velocity of the proton as it entered the region containing the magnetic field? b. What is h, the y co-ordinate of the proton as it leaves the region conating the magnetic field? c. What is Bz, the z-component of the magnetic field? Note that Bz is a signed number. 2. Relevant equations The website for my homework offers no equations whatsoever. Everything has to be derived. 3. The attempt at a solution I managed to solve the radius of the circular path, R = 1.549m, but I still need to find the initial Velocity (V), the height at which the particle leaves the field (h), and the magnitude of the magnetic field (Bz). I've seen this problem twice on this site, but the walk throughs both covered how to solve for R, which I have already done. I don't know the set up for solving for V, h, or Bz. I honestly don't even know where to begin.