MTB_prodigy said:
does anyone understand what im trying to say?
ummmmm, maybe, or maybe not....
One thing about berms, especially big, steep ones is that there is a significant elevation difference from the inside line to the outside line. For a downhill berm, or for someone who is railing it, the elevation change probably doesn't matter. But as an intermediate rider who is trying to work up more nerve in the corners, maybe I get what you are saying because sometimes I think about things too much.
If you come into a turn slowly and take a low line, you may still feel fast.
If you come in slow and try to get up on a higher line, you may feel like the bike is stalling out because you are forcing the bike higher in elevation and keeping it there longer. This is fighting gravity.
If you come in faster, the bike will have more momentum to keep it from stalling, you will also be on the berm for less overall time, you will have more centrifugal force holing you on your line, you probably also have some better pumping technique so you can make it work for you.
It is all potential energy and kinetic energy. The more elevation you gain, the more you slow down, but that energy is stored and ready to be released the next time the bike is pointed down. Think about wallrides, it is all about technique and speed. To get on the wall you need the right technique, to take a high line and really ride it, you need to commit with a lot of speed, otherwise you will stall out, lose centrifugal force and you won't stick it.
Or imagine a quarter-pipe. It is just a berm that you ride at directly, you lose speed as you go up, there is a moment where you a basically stopped (no kinetic energy, all potential energy). Then, with the right technique, you will roll back down into the transition, and if you pump it, you will finally roll out the bottom with more speed than on the approach (back to full kinetic energy).
Maybe the kinetic energy changing to potential energy is what you are talking about, maybe not. At any rate, not many people will agree with you that a berm actually slows you down, after all, the whole point of a berm is to carry more speed (and help to transfer potential energy AND pump into even more speed, depending on the berm entrance/exit/gradient, etc, etc...)