The ConstantForce attached to this GameObject (null if there is none attached).

	constantForce.relativeForce = Vector3(0, 0, 1);

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        constantForce.relativeForce = new Vector3(0, 0, 1);
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		constantForce.relativeForce = Vector3(0, 0, 1)