The force - relative to the rigid bodies coordinate system - applied every frame.
// Moves the rigidbody forwardconstantForce.relativeForce = Vector3.forward * 10;
using UnityEngine;using System.Collections;public class example : MonoBehaviour { void Example() { constantForce.relativeForce = Vector3.forward * 10; }}
import UnityEngineimport System.Collectionsclass example(MonoBehaviour): def Example(): constantForce.relativeForce = (Vector3.forward * 10)