Question for Game developers

Hills. Climbing Hills.

Is there a specific Equation (mathematical) that calculates the speed of an object climbing up a hill. I would imagine that there would be multiple Variables;

  • the weight of the object climbing
  • the angle of the hill
  • the type of object (vehicle or person, or person on mount)
  • location

Examples.
I was watching a Wukong gameplay, i noticed how (game developers) they placed emphasis when the character was moving up a hill.

When it comes to WoW, the Hills in Isle of Conquest (battleground map). The Hills towards the Hanger Location.
The Horde have a very steep Hill to climb, whereas the Alliance just a small steep hill then a flat surface.

Do all games, recently developed/updated share a universal equation/process to calculate the movement up a hill ?