An irregular conductor carries a surface charge density of -6.75 µC/m2 at and in the vicinity of a point P on the surface. An electron is released just above P outside the conductor. (ε0 = 8.85 × 10-12 C2/N · m2, e = 1.60 × 10-19 C, m el = 9.11 × 10-31 kg)

A) What is the magnitude of its acceleration the instant after it is released?

What is the direction of its acceleration the instant after it is released?
-Toward P
-Away from P
-None of the above

F=qE and F=ma , E=a( for example, a=gravity field, and E= electric field), mass and charge can be viewed the same too

so, ma=F=qE

opposite signs= attract, same signs repel

E, your electric field isn't given. but can be found by relation of charge density and ε0
I'll let you read that up

This post was edited by saber_x3 on Sep 15 2013 04:17pm