An object on a spring is stretched from its equilibrium position by 2 cm and then released. 4\pi seconds later it is moved by an impluse of 0.5 g*cm/s in the direction of the spring compression. If the mass of the object is 10 g, the spring constant is 10 g/s^{2}, and there is no damping, find the displacement from the equilibrium of the object at time t.