Of course, I don't need anyone to solve my problem only to guide me where to start.
about the problem yes I do understand that i have one block in acceleration (lower one) and the other that starts to slide is affected by friction(static) force and i need to find F and a of the system what i...
in the A we need to find the force and acceleration of the system when we pull the lower block and the upper mass starts to move
in B we need to find the force and acceleration of the system when we pull the upper block and the upper mass starts to move
the friction before the lower mass and...