So if an electron enters an electric field (between two charged parallel plates) at an angle (i.e not parallel to the x axis) and knowing that the speed is, say, 5 x 10^6 m/s, how would you find the HORIZONTAL velocity of the electron?
you know that horizontaly it must be (5 x 10^6)cos(theta) and that vertically it must therefore be (5 x 10^6)sin(theta) but how would you find the horizontal velocity?
please help, very appreciated! :)
The Attempt at a Solution
I thought it might help knowing that sin(theta)/cos(theta) = tan(theta) ?
But no idea how to find the horizontal speed...