A positive charge moves in a region where the magnetic field is uniform, has a magnitude of 60 uT and points in the positive x direction. At t=0 the charge has a velocity that has an x component of 30 km/s, a y component of 40 km/s, and a z component of zero. take the mass of the charge as m=9.11x10^-31kg, and the charge q=1.6x10^-19C.
a) what is the radius of the resulting path?
b) how far does the carge move in the forward direction for each rotation?