How can i make my own physics

i dont even know where to start off with

What aspects of the current physics is not good enough for you needs?

The only thing I can think of that you would need to change is the gravity. You can find it in the game settings:

i mean the roblox physics are enough but i want to make my own physics just for fun

Basically you want to make your own game engine? I would recommend using a language other than lua than this. Over-riding Roblox’s current physics engine would be an extremely difficult task and wouldn’t really reflect what is actually involved in writing a physics engine

but is there a way to disable roblox physics

I’m pretty sure there is no way to disable the engine. The closest you can get is to set the gravity to 0, and set all parts to CanCollide=false

ok ill try to do that, thanks for your help

evade did this, how can I reach a physics like evade?