Two masses m and 2m are suspended together by a massless spring of force constant. in equilibrium, mass m is removed without disturbing the system. then, the am

Two masses m and 2m are suspended together by a massless spring of force constant. in equilibrium, mass m is removed without disturbing the system. Then, the amplitude of vibration of the system is: When the masses are K 2m O mg K O g 3mg O