Today we investigate the motion of a charge in a uniform electric field. The electric field is 200 N/C and is in the positive x-direction. The particle has charge 10m C, mass 10 g and is at the origin, moving along the y-axis at 10m/s at time t=0. When does the particle reach x = 1 m? What is its y coordinate then?

The particle's acceleration is in the x-direction, with

This acceleration is constant, so the particle's motion in the x-direction is described by equation 2.11 with vi = 0.