1. The problem statement, all variables and given/known data The potential energy of a system of two particles separated by a distance r is given by U(r) = (A)/(r^4), where A is a constant. Find the radial force that each particle exerts on the other. (Use A and r as appropriate in your equation.) 2. Relevant equations F=-dU/dx U is potential energy 3. The attempt at a solution i figured out the antiderivative of U(r) is -(A)/(3*r^(3)) but it isnt the correct answer. what else do u need to do besides the antiderivative which is equal to force. since it is 2 particles should i divide the U(r) funciton by 2?