The strength of the force in correspondence to the distance of the affected object
https://doc.babylonjs.com/how_to/using_the_physics_engine#further-functionality-of-the-impostor-class
Defines that the upstream forces will pull towards the top center of the cylinder
Defines that once a impostor is inside the cylinder, it will shoot out perpendicular from the ground of the cylinder
The strength of the force in correspondence to the distance of the affected object
https://doc.babylonjs.com/how_to/using_the_physics_engine#further-functionality-of-the-impostor-class