In the pulley-block system shown in figure strings are light, the pulleys are light and smooth. The system is released from rest. At t = 0.3 s

Using the concepts of Laws of Motion and Kinematics we can draw following diagrams and then using the definition of work, we can find Corresponding work done.For 1 kg body 2T-10=2a2 for 2 kg body 20-T=2a  solving the two equation we get T=203N