A 500-g mass is attached to a spring with stiffness 5 N/m. The damping constant for the system is 1 N-sec/m. If the mass is pushed to 2 m to the left of equilibrium and released from there, determine the equation of motion of the mass. Also give its damping factor, quasiperiod, and quasifrequency. This is free and underdamped motion. Solution.