find a sphere position

hi I am new at unity and i want to ask a questions. I am stuck last two days to make this. I have sphere and i want to bounce it as a ball but i cant understood that how i will take it specific location. I mean when i press it left bottom the sphere will bounce to the right with touching angle and when i touch right bottom it will bounce to the left same. I am taking position but it is not sphere position it is global positon. Here is my code. Sorry for my English :)

private var hit : RaycastHit; private var ray : Ray; var skor : int=0; private var speed : float = 0.1;

function Update () {

 for(var touch : Touch in Input.touches)
 {
 if(Input.GetTouch(0).phase==TouchPhase.Began) {
     ray = Camera.main.ScreenPointToRay(Input.touches[0].position);
     Debug.DrawLine(ray.origin,ray.direction * 10);
     if(Physics.Raycast(ray.origin, ray.direction * 10,hit)){
         if(hit.collider.gameObject.name=="top")
         {
             if(!gameObject.rigidbody)
             {
                 gameObject.AddComponent(Rigidbody);
                 rigidbody.mass=0.1;
             }
             
             var pozisyon : float = Input.touches[0].position.x;
             
             var ekranOrta : Vector3 = new Vector3( Screen.width/2,Screen.height/2,0);
             var dokunmaPozisyon : Vector3 = Input.touches[0].position - ekranOrta;
             var UpVektor : Vector3 = new Vector3(0,1,0);
             var aci : float = Vector3.Angle(UpVektor, dokunmaPozisyon);        
             
             if(Input.GetTouch(0).position.x>425)
             rigidbody.AddForce(Vector3(-aci*speed,40,0));
             
             else if(Input.GetTouch(0).position.x<425)
             rigidbody.AddForce(Vector3(aci*speed,40,0));
             
             else if(Input.GetTouch(0).position.x==425)
             rigidbody.AddForce(Vector3(0,40,0));
             
             skor++;
             var skorYazi : GUIText = gameObject.Find("skor").GetComponent(GUIText);
             skorYazi.text=""+skor; 
         
         }
       }
     }
 }

}