A ball of mass m is connected to two rubber bands of length, L, each under tension T, as in Figure P12.49. The ball is displaced by a small distance y perpendicular to the length of the rubber bands. (a) Assuming that the tension does not change, show that the restoring force is -2yT/L . (b) Assuming that the tension does not change, show that the system exhibits simple harmonic motion with an angular frequency . I have no idea how to solve this. I think it has something to do with F=ma, but I don't know exactly what. Help?