@@Daisy-i9h9t bcoz block has moved from point A to point B with some sort of acceleration in x direction. That's why we are finding ax value at point B.
Thanks for the video. But there is no way that this kind of lengthily problem would show on the FE exam. FE exam problems are put to be solved in less than 3 minutes.
This could easily be on the FE. If you know your way around kinematics, this is a simple problem. I'd imagine there could be a similar problem in the statics section as well.
You took 11 minutes to solve it, however, you know each step and do it with no thinking. Does it make any sense to come in fe exam with 3 minutes to be solved ?
That is a good approach actually! Always mark the difficult and long questions and return to them at the end. Being organized and having an exam strategy will go such a long way in passing the FE.
