Three blocks $M_1, M_2, M_3$ having masses $4\mathrm{~kg}, 6\mathrm{~kg}$ and $10\mathrm{~kg}$ respectively are hanging from a smooth pulley using rope 1, 2 and 3 as shown in figure. The tension in the rope 1, $T_1$ when they are moving upward with acceleration of $2\mathrm{~ms}^{-2}$ is $\_\_\_\_$ $\mathrm{N}$ (if $\mathrm{g} = 10\mathrm{~m/s}^2$).