How to add a force correctly to a sphere in a physic game

hi guys,

I am making a physic game like Hamsterball, and I'm trying to add in some ramps and loopings. but before them to work I need to ad a big force so the ball gets accelerated allot. First toughed was just adding a force to it and it should work, well it works but it gives allot of strange side effects which should not happen?

the sphere I am using is a normal sphere with a normal sphere collider. And I am using a torque to move it around.

     void OnTriggerEnter(Collider other){
         if (other.tag == "Player")
         {
             other.transform.GetComponent<Rigidbody>().rotation = Quaternion.Euler(new Vector3(0, 0, 0));
             other.transform.GetComponent<Rigidbody>().velocity = new Vector3();
             Debug.Log("transform.forward: " + transform.forward + " total: " + (transform.forward * SpeedUpPower));
             other.transform.GetComponent<Rigidbody>().AddTorque(transform.forward * SpeedUpPower, ForceMode.Impulse);
             other.transform.GetComponent<Rigidbody>().AddForce(transform.forward * SpeedUpPower, ForceMode.Impulse);
         }
     }

this is what I got now, but the strange behavior are the following points:

• sometimes the ball just bounces to a complete random direction

• sometimes the ball hits the level instantly and slows down completely so it just gets stuck into the level mesh

• the forces are sometimes much more or much less depending on how I approach my ramp

this are the things I tried already: changing the physx materials to no friction changing the forcemodes * changing the speedup to go slightly in the air so it does not bounce in the level, but it can still bounce to random directions

I did allot more random stuff, but I am just to inexperienced with physx games to pinpoint my issue here so any help would really be appreciated!!

also some print screens of the things I would like to do: