In the figure shown ${\text{m}}_1=1\text{kg,}{\text{m}}_2=2\text{kg}$ , pulley is ideal. At t = 0, both masses touches the ground and string is taut. A force F=2t is applied to pulley (t is in second) then $\left(\text{g}=10{\text{m/s}}^{\text{2}}\right)$