A proton has an initial velocity of 450000 m/s in the horizontal direction. It enters a uniform electric field of 9600 N/C directed vertically up.
  1. Find the time it takes to travel 5 cm horizontally.
  2. The vertical displacement of the proton after it has travelled 5.0 cm horizontally.
  3. The horizontal and vertical components of velocity after it has travelled 5.0 cm horizontally.