As an example of the manipulation of an electron beam, consider an electron traveling away from the origin along the x axis in the xy plane with initial velocity vi= vii. As it passes through the region x = 0 to x = d, the electron experiences acceleration a = axi + ayj, where ax and ay are constants. For the case vi = 1.74 ✕ 10^7 m/s, ax = 7.84 ✕ 10^14 m/s2, and ay = 1.51 ✕ 10^15 m/s2, determine the following, at x = d = 0.0100 m. (a) the position of the electron (yf=?) So, I went through, and I used the equation d=vi*t+.5(at^2) I plugged in: .01=1.74*10^7t+.5(7.84*10^14)t^2 I got the time to be 5.67458*10^-10 Now, I know you have to plug the time into an equation, along with the acceleration of y, but Im confused on which equation to use since you only know acceleration and time for the y coordinates? (b) the velocity of the electron So, I used: vf=vi+at vf(x)=5.67458*10^-10 X 7.84*10^14 and wouldn't you do the same for the y coordinates? Thank you!