How To Stop Constant Movement of RB Force

So, I'm in the process of making a pinball type game, but the plunger, or spring (or thing that makes ball go), keeps moving after running through a teleportTarget trigger. Make long story short, I need to find a way to either create a force to stop the constant moving of the plunger, or create a negative force to stop it in its tracks (Plunger Script and trigger script below)

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

public class SpringScript : MonoBehaviour { public float springPush = 5000f; public Rigidbody rb;

 void FixedUpdate()
 {
     if (Input.GetKeyDown(KeyCode.Space))
     {
         rb.AddForce(0, 0, springPush * Time.deltaTime);
     }
 }
 **//the problem area**
 void OnCollisionEnter (Collision collsiionInfo)
 {
     if (collsiionInfo.collider.tag == "SpringTrigger")
     {
         
     }
 }

}

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

public class SpringReset : MonoBehaviour { public Transform teleportTarget; public GameObject spring;

 void OnTriggerEnter(Collider other)
 {
     spring.transform.position = teleportTarget.transform.position;
 }

}