Why does the position not change?

Question

Unity

The character falls from y = 50, there is a plane trigger on y = 0.
The script is attached to the character, the log outputs, but the position does not change (the character is assigned to obj).
What could be wrong?

void OnTriggerEnter(Collider other)
    {
        Debug.Log("TRigger");
        obj.transform.position = new Vector3(0f, 300f, 0f);
    }

Answer 1

Something like that. I would describe more precisely what is happening on your stage in general.
obj.transform.position = obj.transform.position * new Vector3(0f, 300f, 0f);

Answer 2

Try this
void OnTriggerEnter(Collider other)
{
Debug.Log("TRigger");
transform.Translate(Vector3(0f, 300f, 0f));
}