Resolved Why does force.impulse keep applying forever after the attack?

Hello, I am new to UnitY and can't find the answer to my question.
My attack script is made so if the attack hits then it sends the enemy's take damage script: the damage of the player, the possition of the player and the knockback force.
The force keeps applying in the same direction as the original knockback direction and does not update if i move around.
For the enemy ai i used Nav Mesh Agent.

Attack script

Code (CSharp):

1.  public void attack()
2.     {
3.         if(Time.time >= playerAttackSpeedCounter )
4.         {
5.             Collider[] colliderArray = Physics.OverlapSphere(attackPoint.position, attackRange, hittable);
6.             foreach (Collider collider in colliderArray)
7.             {
8.                 collider.GetComponent<EnemyHealth>().takeDamage(playerDamage, transform.position, knockback);
9.            
10.             }
11.        
12.             playerAttackSpeedCounter = Time.time + playerAttackSpeed;
13.             attackAnim.Play(attackName);
14.         }
15.  
16.     }

Takdemage script

Code (CSharp):

1.     public void takeDamage(float playerDamage, Vector3 playerPos, float knockback)
2.     {
3.         //damage
4.         enemyHealth -= playerDamage;
5.  
6.         //knockback
7.         Vector3 knockbackDirection = transform.position - playerPos;
8.         rb.AddForce(knockbackDirection.normalized * knockback, ForceMode.Impulse);
9.     }

 

I did not have drag on my Enemy object. I put the drag to 1 and now it works as i wanted to.