1. The problem statement, all variables and given/known data A charge of -6mC is placed at each corner of a square .1m on a side. Determine the magnitude and direction of the force on each charge. upper left is 1, bottom left is 2 upper right is 4 bottom right is 3 http://img208.imageshack.us/img208/7318/payxhbx6.jpg [Broken] 2. Relevant equations F=k (Q1Q2)/r^2 3. The attempt at a solution sigh im back again.. I start with F12 so i did: 9 X 10^9(6 X 10^-3 X 6 X 10^-3/.1^2) and i got 3.24 X 10^7 since all the charges are the same the answer is going to be the same for all the charges so F14 is also 3.24 X 10^7. Now i break F12 into x and y components: since 1 and 2 is repulsive there is no x component so the y component is is +3.24 X 10^7N as for F14 there is no y component so x is -3.24 X 10^7. now i do resultant formula: total x is -3.24 X 10^7 and total y is +3.24 X 10^7 so the resultant should be... 4.58 X 10^7 right the book get the answer as 2.96 X 10^7 where did i go wrong?