Please Help - Electrochemical force questions

I am confused with "electrochemical-force" concept. Isn't there anyone who can explain electrochemical force in nervous system? Please read my question and "answers", I am not 100% confident with my answer.
Thank you for all your help.

1. What is the net (total) electrochemical force (its size and direction) acting on Na+ at the resting potential? (-70mV)

-->Resting state :Gated Na+ and K+ channels are closed. Sodium-potassium pump works. Na+ will not move too much.


2.. What is the net (total) electrochemical force (its size and direction) acting on Na+ at the peak of the action potential? (+30mV)

-->Na+-K+ pump works. Gated Na+ channel open. Lots of Na+ gets inside of the membrane. At about +30 mv, Na+ channel close, ending the depolarization.