you have 2 equal masses m1 and m2 and a spring with spring constant k. the mass m1 is connected to teh spring snd placed on a frictionless horizontal surface at the relaxed portion of the spring. you then hang m2, connected to m1 by a massless cord, over a pulley at the edge of the horizontal surface. when the entiresystem comes to rest in the equilibrium position, the spring is stretched an amount d1. determine amount the spring stretched when m1 is attached to m2