'Unity- should moving object in 'X' Axis be in Update or fixedUpdate.?

i know physics should be in fixedupdate. but what about moving the object in 'X' Axis forever, does it also count as physics movement?

    void Update () {
    Vector3 temp = transform.position;
    temp.x += speed * Time.deltaTime;
    transform.position = temp;
}

unity3d

Solution 1:^[1]

Putting it in Update should be fine

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Solution	Source
Solution 1	Rebecca