Using the electric field described in the alpha cannon simulation, suppose that an alpha particle is fired upward from a height y = 0 m, with horizontal and vertical velocity components vx = 15.0 m/s and vy = 5.00 m/s.
(a) How much time passes before the particle returns back down to the height y = 0 m?
(b) What is the horizontal distance traveled by the particle before it returns to the height y = 0 m?