Add gravity to an 2D Object with an trigger

How can i add gravity to an 2D objectif my player approches it

Thats my code

    #pragma strict
   
        var Object : UnityEngine.GameObject;
        
     function OnTriggerEnter2D ( other : BoxCollider2D ) {
     ObjectToFall.rigidbody2D.gravityscale = 1;
    
   }