Chapter 1, Problem 16P

In the problem 15 above, what is $v_y$ , the y-component of the electron’s velocity, when it has reached the right edge of the plates? Note that $a_y=\frac{\Delta v_y}{\Delta t}$ (be careful with the sign). How is the ratio $S\text{/}L$ related to $v_x$ and $v_y$ , if $v_y$ is calculated at the right edge of the plates? The distances S and L are shown in Figure 1.11.