sorry for the bad English, I have a problem, I’m simulating a game neverball type, use the kinematics, but when I rotate the inclined plane where there is too strong the ball, it penetrates the floor, I tried them all, I thank everyone can help.
http://imageupload.org/?d=D9963F801
2 http://imageupload.org/?d=4652F3711
2.jpg: 
3 http://imageupload.org/?d=2FBAA8681
3.jpg: 
If your floor is one big box, I have read that can cause this issue of things falling through other things.
Check out this post…
http://hub.jmonkeyengine.org/groups/general-2/forum/topic/falling-through-floorspeed-issue/
A) Huge boxes are not good
B) Your play area looks like its a mesh collision shape, you know you cannot move these right?