An electron travels at horizontal velocity 5*10^6m/s in a vacuum between two charged plates 100 mm long and am apart, to which a p. d. of 30 V is applied. The charge on
dectron is 1.5 10 C and the mass of an electron is
1x 10 kg
What size force will the electron experience while it passes
through the plates?
What acceleration will this give to the electron
If the positive plate is the lower one, in which direction will
the electron accelerate?
d) How long will it take for the electron to pass through the
plates​

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

I’m not sure about this question