i need help with the on collision script of rigidbody.

using UnityEngine; using System.Collections;

public class NewBehaviourScript1 : MonoBehaviour { public GameObject holeaccess; public NewBehaviourScript holescript; public Rigidbody2D ball; public Vector2 holepos; public int updatestop = 2;

 bool check = true;
   

   
 
 
 public Vector2 force = new Vector2(0, 300);
 

 // Use this for initialization
 void Start()
 {
     holeaccess = GameObject.FindGameObjectWithTag("holeimage");
     holescript = holeaccess.GetComponent<NewBehaviourScript>();


      

     ball = GetComponent<Rigidbody2D>();

     NewBehaviourScript m = GetComponent<NewBehaviourScript>();


  

}

 // Update is called once per frame
 void Update()
 {
     if (check == true)
     {
         holepos = holescript.pos;

         if (Input.GetKeyUp("space"))
         {
             ball.velocity = Vector2.zero;

             ball.AddForce(force);
         }

     }
     


 }
 void OnTriggerEnter(Collider other)
 {

     ball.position.Set(holepos.x,holepos.y);
     check=false;
    ball.gravityScale
  
 }

}

In the above script i want to set the ball position to hole postion when they collide. The hole is in other script. Also i want to disable gravity on collision. I have checked istrigger to disable default collision effect. What am i doing wrong here please help. i am not able to disable gravity nor am able to reset ball`s position. Please help.