A proton is traveling horizontally to the right at 5.00×10⁶ m/s .Find
(a) the magnitude and
(b) direction in degrees (counterclockwise from the left direction) of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.20 cm.
How much time does it take the proton to stop after entering the field?
What minimum field would be needed to stop an electron under the conditions of part (a)?