An alpha particle is injected into a set of parallel plates beside the positive plate. The alpha accelerates from rest across a potential difference of 4.00 x 104 V. Calculate the final speed of the alpha the instant before it strikes the negative plate. a. 2.01 x 106 m/s b. 1.96 x 106 m/s c. 1.95 x 1012 m/s d. 3.84 x 1012 m/s