How can I calculate the acceleration in this system?

[Noor_Arnaoud]

Homework Statement

I failed to understand how to compute acceleration here , where we do have an accelerated pulley holding two masses
Help me please

Relevant Equations

F

ma

 

[archaic]

First of all, consider one block of them, and using only variables (don't substitute with numbers), try to find its acceleration.
Hint : What forces are acting upon each block?

 

[kuruman]

Alternatively, if you are in an elevator accelerating up with acceleration $a$ and you stand on a scale, your weight reading will be $m(g+a)$. Now imagine the pulley being attached to the ceiling of this elevator and you put $m_1$ and $m_2$ on the scale before attaching them to the rope. What would the scale read? Therefore, ...