1. The problem statement, all variables and given/known data A particle with charge q and kinetic energy K travels in a uniform magnetic field of magnitude B. If the particle moves in a circular path of radius R, find expressions for speed, v, and mass, m.. (Use any variable or symbol stated above as necessary.) 2. Relevant equations K=1/2mv^2 F=qvB=(mv^2)/R 3. The attempt at a solution 2K=mv^2 ---> qvB=(2K)/R ---> (2K)/(qBR) Why is this incorrect?