... We see that the masses move in phase with each other You will also notice the absense of the spring constant term, κ, for the connecting spring As the masses are moving in step, the spring isn’t ... along the rod’s axis, with the origin at the start of the rod dq 4π x λdx = 4π x dV = This becomes V= (2.1.36) λ x2 ln 4π x1 (2.1.37) where x1 and x2 are the distances from O, the end of the rod ... this into the equation of motion yields y1 = −y2 (1.4.36) Here the masses move out of phase with each other In this case we see the presence of the spring constant, κ, which is expected as the spring...