The pulley can rotate and has no friction.
Block [itex]m_2[/itex] is twice as big as [itex]m_1[/itex]
Find the tensions, [itex]T_1, T_2, T_3[/itex]
Newton's second law
The Attempt at a Solution
By creating a free body diagram only for the block, I got with Newton's second law:
Inserting above values for the other tensions:
Did I solve this correctly? What about the acceleration? Can I do anything about that?