Posted by Jessica on .
An electron is released from a distance of 2 cm from a proton. How fast will the electron be going when it is .5 cm from the proton?
It says to use the work energy thereom, but I don't understand how to use it. any help would be greatly appreciated!

physics 
bobpursley,
What is the PE of the electron at 2cm? That PE must convert to KE.