The Rigidbody attached to this GameObject (Read Only). (null if there is none attached).

	var other : GameObject; 
	other.rigidbody.AddForce(1,1,1);

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    public GameObject other;
    void Example() {
        other.rigidbody.AddForce(1, 1, 1);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	public other as GameObject

	def Example() as void:
		other.rigidbody.AddForce(1, 1, 1)