rigidBody.AddRelativeForce(...) doesn't do antything

I have a capsule 3D GameObject that has a RigidBody assigned to it. It's Y position is frozen. Adding a script to the capsule with the following code:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class PlayerMovementScript : MonoBehaviour {
5.  
6.     Rigidbody rigidBody;
7.     void Start () {
8.         rigidBody = GetComponent<Rigidbody> ();
9.     }
10.    
11.     void FixedUpdate () {
12.         rigidBody.AddRelativeForce (Vector3.forward*5f);
13.     }
14. }

should let the capsule move forward with static speed. However, it doesn't move at all. Help?

 

Turns out it actually worked. It just moved so slow I couldn't see it. Problem solved