1. The problem statement, all variables and given/known data Charges 1 and 3 in the figure below have the same mass and the same speed. Which has the greater magnitude of charge? What are the signs of the charges? http://www.webassign.net/colfunphys1/21-p-001.gif 2. Relevant equations F = |q|v*B*sin(θ) 3. The attempt at a solution The x'es indicate that the direction of the magnetic field is into the screen. What are the arrows referring to? I think the solution has to do with what's perpendicular to the field, and the x-and y- components of these arrows. Can someone help interpret and explain? Thanks!