That is an interesting idea but the trail builders I am aware of are just riders who “know” how to do it. They eyeball it, build it, refine it, then send it. I think the calculations of projectile trajectory would apply (in theory), but the infinite inputs of rider technique, cornering ability, suspension settings, wheel size, tire pressure, would make it pretty difficult to meaningfully model it mathematically. You might be able to get it close enough for a school project