1. The problem statement, all variables and given/known data Magnetic forces do no work because all the force is perpendicular to movement. A bar is moving in a Bfield. "How much work is done on an electron moving across the bar?" Why is there work in this case? 2. Relevant equations F = qvBsin(θ) W = Fd = qvBd*sin(θ) 3. The attempt at a solution Thanks very much.