Imagine a game with an astronaut that is directly controlled by a players pose. If the player now rotates their arm from the waist to the head, a rotation of the whole body in the opposite direction would be the result. Alternatively think about a sprinter which is controlled by the players pose. The player extends one of their legs. What would be the resulting force to the ground or velocity of the sprinter?
How do I calculate the resulting force to the whole body?
For the sake of specifity, you can assume Unity with rigidbody physics, but I'm having a problem of understanding if a rigidbody game engine can even be used to inversely calculate forces from pose changes of a kinematic character.