Simple breakout game issue

so ive been working on a simple Breakout style game. problem is, when you lose the ball below the paddle, the ball wont reset its speed to minimum. heres the script for the ball.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class Ball : MonoBehaviour {
     public float multiplier = 1.1f;
     public float minSpeed = 5;
     public float maxSpeed = 10;
     
     public float curSpeed = 0;
     
     private Transform _t;
     
     public List<GameObject> blocks;
     
     void Awake() {
         _t = transform;
         
         blocks = new List<GameObject>();
     }    
     // Use this for initialization
     void Start() {
         blocks.AddRange( GameObject.FindGameObjectsWithTag( "Block" ) );
         
         ResetBall();    
     }
     
     // Update is called once per frame
     void Update() {
         if( blocks.Count <1 )
             WonLevel();
         if( _t.position.y < -5 )
             MissedBall ();
     }    
     void FixedUpdate() {
         curSpeed = Vector3.Magnitude( rigidbody.velocity );
         
         if (curSpeed > maxSpeed ) 
             rigidbody.velocity /= curSpeed / maxSpeed;
         
         if ( curSpeed < minSpeed && curSpeed > 0 )
             rigidbody.velocity /= curSpeed / minSpeed;
     }
     
     void OnCollisionEnter( Collision col ) {    
         rigidbody.velocity += rigidbody.velocity * multiplier;
         
         if( col.gameObject.CompareTag( "Block" ) )
             blocks.Remove( col.gameObject );        
     }
     
     private void MissedBall() {
         if( Lives.curLives-- < 2 )
             GameOver();
         else 
             ResetBall();
             
         
         
     }    
     
     private void ResetBall() {
         _t.position = new Vector3( Random.Range( -Player.xBoundry + 2 , Player.xBoundry - 2), 2, Player.zPosition );
         _t.LookAt( GameObject.FindGameObjectWithTag( "Player" ).transform.position );
         
                 rigidbody.AddRelativeForce( new Vector3( 0, 0, minSpeed ) );
     }
     
     private void GameOver() {
         Debug.Log(" Game Over");
         _t.renderer.enabled = false;
         rigidbody.velocity = Vector3.zero;
         _t.position = Vector3.zero;
     }    
     
     private void WonLevel() {
         Debug.Log( "We Won Level" );    
     }    
 }