What reasons can be that the ball does not move?

Unity Engine
1

Hi,

I learn the tutorial about Roll-a-Ball for beginner.

I run the project on Unity 5.0.1f1

I press on the button play and play with the arrows keys

To create motion but the ball not move.

What I miss here?

My script for move the ball on the plane:

`using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour {
  
    public float speed;
  
    void FixedUpdate()
    {
        float moveHorizontal = Input.GetAxis ("Horizontal");
        float moveVertical = Input.GetAxis ("Vertical");
      
        Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
      
        if( movement != Vector3.zero) {
            GetComponent<Rigidbody>().AddForce(movement * speed * Time.deltaTime);
        }
    }
}`
2

Make sure you have actually set your speed in the inspector. If it’s 0 your movement vector will be (0, 0, 0).

EDIT : Or, honestly, just set it in Start(). You can still see it in the inspector for debugging purposes but it’ll make your life easier later if you can view the default value from code.