At a carnival, some students are riding bumper cars. A 100 kg bumper car gliding at 1.6 m/s bumps into a 120 kg bumper car

that is at rest. If they collide elastically and the 120 kg car has a velocity after collision of 1.45 m/s,

what is the final velocity of the 100 kg car after they bounce apart?

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.