The masses you see on the following picture are $m_1=8$kg and $m_2=12$kg. Also the coefficient of friction between $m_2$ and the floor is $0.25$.
What i'm concerned with is that although $m_2 >m_1$ the system will move. $m_1$ will move downwards and $m_2$ to the left. Why do they move? Also, should the tension of the string $T_1$ and $T_2$ be the same (because we have only one string)? And finally when the bodies will move should their accelerations be the same, or not? Thanks a lot in advance.