3. same questions as the previous problem, but for mass m just falling 3 meters in a vacuum: (a) how long does it take mass m to fall 3 meters? (b) what is its final velocity (with direction)? (c) explain what physics principle makes (b) be the same or different in problems (2) and (3).

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.