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Potential energy between two point charges.?
I have a homework problem problem I cannot figure out. (Phys II)
Basically a formula is given (W = Ui - Uf = - delta U ) Trying to find work done between to points.
I have found Ui (-0.137J) and Uf (-0.434J), I already input them so I know its correct values, but when ever I try to input into the equation I keep getting a wrong answer.
I am coming up with (-0.297) but evidently this is wrong? I just subtracted (Ui-Uf) and that should have given me a negative delta U which is also equal to work in Joules? I dont know where im going wrong.
An explanation would be helpful so I dont make this mistake again. Thanks!
