Unity２Dにおける当たり判定/物理反射

前提・実現したいこと

Unity２Dでブロック崩しを制作しています。
ボールが当たったら物理反射を実装したいです。

発生している問題・エラーメッセージ

ボールがブロックに当たったら消える処理はUnityの機能を使用して実装できたのですが、その処理はただ消えるだけで物理反射をしてくれません。

エラーメッセージ

該当のソースコード

ボール
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player : MonoBehaviour
{
private float speed = 1000.0f;
private int HP = 9;
public Rigidbody2D rd;
private float px;
private float py;
// object gameObject Obstacle;
//private int HP =;
// Start is called before the first frame update
private void Start()
{
//物理演算コンポーネント取得
var body = gameObject.GetComponent<Rigidbody2D>();

    //反射計算
    var direction = new Vector2(speed, speed).normalized;

    body.velocity = direction * -10 * transform.localScale;


// this.rd = GetComponent<Rigidbody2D>();
//this.speed = 100;

}

// Update is called once per frame
void Update()
{
/if (Input.GetMouseButton(0))//マウスの左で発射
{
this.startPos = Input.mousePosition;
}
else if (Input.GetMouseButtonUp(0))
{
Vector2 endPos = Input.mousePosition;
Vector2 startDirection = -1 * (endPos - startPos).normalized;
this.Rigidbody2D.addForce(startDirection * speed);
}/

// public void Cllide()
// {
//if () {
//if(HP <= 0)
/{
Destroy(gameObject);
}///Destroy; }
//}
void TixedUpdate()
{
this.rd.velocity *= 0.9995f;
}

//当たり判定(IsTriggerにチェック入れる)
/*if(c.name == "Obstacle" && HP > 0){HP -= 1;} 
     //else if(c.name == "Player" && HP = 0)
     //{Destroy(gameObject);
     }*/
/*
 void FixedUpdate(){
 this.Rigidbody.velocity *=0.995f;}*/
// void OnTriggerEnter2D(Collider2D c)
/*if(c.name == "Obstacle(Clone)" && HP > 0){HP-=1;} 
     else if(c.name == "Obstacle(Clone)" && HP = 0)
     {Destroy(gameObject);
     }*/

}

該当のソースコード

ブロック
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Obstacle : MonoBehaviour
{
public int HP;
private Object Player;
private float ox;
private float oy;
private float x;
private float y;
// Start is called before the first frame update
void Start()
{
//物理演算コンポーネント取得
var body = gameObject.GetComponent<Rigidbody2D>();

    //反射計算
    var direction = new Vector2(0, 0).normalized;

    body.velocity = direction * -10 * transform.localScale;

}

// Update is called once per frame
void Update()
{

    // if(HP <= 0)
    // {
    //     Destoroy(gameObject);
    // }

}
/*public void Destroy{
 * if(ox)}*/

//当たり判定(IsTriggerにチェック入れる)
void OnTriggerEnter2D(Collider2D c)
{
    if (c.name == "Player1" || c.name == "Player2" || c.name == "Player3" || c.name == "Player4" || c.name == "Player5" ||
      c.name == "Player6" || c.name == "Player7" || c.name == "Player8" || c.name == "Player9")
    {
        Destroy(gameObject);
    }
}
/*if(c.name == "Player1" || c.name == "Player2" || c.name == "Player3" || c.name == "Player4" || c.name == "Player5" || 
 * c.name == "Player6" || c.name == "Player7" || c.name == "Player8" || c.name == "Player9" && HP > 0){-1;} 
    else if(c.name == "Player1" || c.name == "Player2" || c.name == "Player3" || c.name == "Player4" || c.name == "Player5" || 
    c.name == "Player6" || c.name == "Player7" || c.name == "Player8" || c.name == "Player9" && HP = 0)
    {Destroy(gameObject);
    }*/
//}

}