Following the Unity 'Roll-a-Ball' tutorial but ball won't move

Questions & Answers
1

I have followed all of the steps up to the point where the ball is about to be moved, my code is

using UnityEngine;
using System.Collections;

public class playerController : MonoBehaviour 
{
	void FixedUpdate()
	{
		float moveHorizontal = Input.GetAxis("Horizontal");
		float moveVertical = Input.GetAxis("Vertical");

		Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveHorizontal);

		rigidbody.AddForce(movement);
	}
}

and I have the playerController.cs linked with the Player object. When I click play and try to move the object nothing happens and I get the error:

Unity MissingComponentException: There is no 'Rigidbody' attatched to the "Player" game object, but a script is trying to access it.

The tutorial didn’t mention having to add this - what am I meant to do?

I am using this video. This is the point where I am up to.

2

You need the Rigidbody component on the player object for the script to use ‘rigidbody.AddForce(movement)’.
If there’s no Rigidbody component attached to the player, rigidbody.AddForce has no rigidbody to use.