7) a proton is moving in a circular orbit o radius 14 cm in a uniformo.35-t hagnetic field perpendicular to the velocity of the proton. (a) find the linear speed of the proton. (b) what if an electron, rather than a proton, moves in a direction perpendicular to the same magnetic field with this same linear speed? will the radius of its orbit be different?

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.