Two masses 10kg and 20kg are connected by a massless string. A force of 200N acts on 20kg mass. At that instant when 10kg mass has an acceleration 12m/s^2 the energy stored in the spring (k=2400N/m) will be
Two masses 10kg and 20kg are connected by a massless string. A force of 200N acts on 20kg mass. At that instant when 10kg mass has an acceleration 12m/s^2 the energy stored in the spring (k=2400N/m) will be