AddForce to Camera

Hello everybody! I am making a game where my player is looking through a camera. (Like fps, but more fp of fps.) My script is:

 using UnityEngine;
 using System.Collections;
 
 public class jumpAfterTest : MonoBehaviour 
 {   
 
     public void JAT ()
 
     
 
     {
 
     
         Debug.Log("Me is JAT");
         //add effect here
         GetComponent<Rigidbody>().AddForce (transform.up * 1000);
     }
 
 
 
 }

It is unusual, I know, because it is triggered by:

 using UnityEngine;
 using System.Collections;
 
 public class Test: MonoBehaviour 
 
 {
     public jumpAfterTest _jumpAfterTest;
 
     void OnMouseDown() 
     {
         Debug.Log ("Mouse Down");
 
         _jumpAfterTest.JAT ();
 
     }
 
 void OnMouseUp()
     {
         Debug.Log ("Mouse up");
 
     }
     
 }

As far as I can see, my addforce code is fine, but the jumpAfterTest script won't work. My camera that the script is attached to doesn't move. I don't know why it won't. jumpAfterTest is receiving input. Please help me out if you can. Is this AddForce not working because it is a camera it is attached to? Thanks. ( By the way, I am in ios)