In figure m1 = 5 kg, m2 = 2 kg and F = 1N N.

In figure $\mathrm{m} 1=5 \mathrm{~kg}, \mathrm{~m}_{2}=2 \mathrm{~kg}$ and $\mathrm{F}=1 \mathrm{~N} \mathrm{~N}$. Find the acceleration of either block. Describe the motion of $\mathrm{m}$, if the string breaks but F continues to act.