Let the speeds of drivers E and N prior to the collision be denoted by v_e and v_n, respectively. Find v2, the square of the speed of the two-car system the instant after the collision. Express your answer terms of v_e and v_n.

If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction