1. The problem statement, all variables and given/known data I got this problem from my physics textbook, and I'm not sure how to solve it. A point charge R is distance p from the center of a diple consisting of charges + and - q separated by distance s. The charge R is located in the plane that bisects the dipole. What is the force (don't forget direction) on the dipole? Assume that p is much bigger than s. 2. Relevant equations Electric field due to a dipole: K2qs / r3, where s is the length of the dipole, q is the charge of the dipole, and r is distance from it. 3. The attempt at a solution The first thing I'm not sure about is the part that says "located in the plane that bisects the dipole". What does that mean? I have decided to calculate the force of the dipole on the charge R, rather than the other way around. So, the electric field due to the dipole is: E = (K)(2qs) / (r3). Multiply this by R to get force. However, I don't know how you figure out the direction! Next I have to figure out the torque on this so I will need to calculate the angle the dipole makes with the electric field. Ideas?