I had an exercise like the image, where block A is pulled by a force F, there is that rope(tension) attached to the block B and the wall, and there is friction between A and B, and A and the ground, and the coefficent of friction is the same in both cases. The question asks us what is the intensity of the force required to start moving the blocks.
I know what you say, that's How I did initially, and it gave me a wrong solution. I will post the exercise to you solve by yourself. If I got the same system, without the rope, considering there is friction between the blocks, and A and the ground, is there friction between the blocks while I'm pulling block B but the system doesnt start moving?