Amass of 2 kg stretches a spring 4 cm. there is no external force and the mass moves in a medium that impacts a viscous force of 2 n when the speed of the mass is 2 cm/s. if the mass is set in motion from position 1 cm below equilibrium with an initial velocity of 3 cm/s formulate the initial value problem for the motion of the mass x(t). determine the frequency, period, amplitude, and phase of the motion.