Jack thank you very much, your solution works like a charm.
I'm almost 100% happy with the results except by the fact that i need to dive into trigonometry again to fix it in my mind
Rodrigo, that could be an option, but for the motion that i've planned the ease is fundamental. As soon as i can, i will post the final result here. Ins't 100% dynamic how i would like to, but i think the final result was cool.
In the first time i was using TimelineMax to control all of this (in/out), i give up cause i don't find a way to change the ease of those objects after i've created them. After a little research i saw that could not be a good ideia change the ease after it's created.
More infos (http://forums.greensock.com/topic/7810-change-easing-on-timeline-tweens-without-remaking-the-timeline/)
In the meanwhile i realize that this motion would be more cool if the objects enter from one point of the screen and get out by another one
JFY you guys rock!