Ball controller.

Ball.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Ball : MonoBehaviour{

    public Rigidbody rb;
    public float force;

    void Start(){
        force = 400f;
        rb = GetComponent<Rigidbody>();
    }

    public void Jump(){
        rb.AddForce(new Vector3(0,1 * force,0));
    }

    public void Forward(){
        rb.AddForce(new Vector3(0 , 0 , 1 * force));
    }
}