Player moves faster when fps is higher?

Hello Unity community, Cobalt 60 here and I was wondering? why does my player move faster when the frames per second... Like when my game is at 80 fps he moves at the perfect speed. but when I hit 160 fps or higher than 80 or lower than 80 the player's top speed is changed. I have seen tutorials where you add some thing like Time.Deltatime I just want to know how to implement this in thy script lol. here it is if you need some reference.

 using UnityEngine;
 using System.Collections;
 
 public class PlayerControl : MonoBehaviour 
 {
 private GameObject _GameManager;
 public Vector3 movement;
 public float moveSpeed = 6.0f;
 public float jumpSpeed = 5.0f;
 public float drag = 2;
 private bool canJump = true;
 
 void Start()
 {
 _GameManager = GameObject.Find("_GameManager");
 }
 
 void Update () 
 {
 Vector3 forward = Camera.main.transform.TransformDirection(Vector3.forward);
 forward.y = 0;
 forward = forward.normalized;
 
 Vector3 forwardForce = forward * Input.GetAxis("Vertical") * moveSpeed;
 rigidbody.AddForce(forwardForce);
 
 Vector3 right= Camera.main.transform.TransformDirection(Vector3.right);
 right.y = 0;
 right = right.normalized;
 
 Vector3 rightForce= right * Input.GetAxis("Horizontal") * moveSpeed;
 rigidbody.AddForce(rightForce);
 
 if (canJump && Input.GetKeyDown(KeyCode.Space))
 {
 rigidbody.AddForce(Vector3.up * jumpSpeed * 100);
 canJump = false;
 _GameManager.GetComponent().BallJump();
 }
 }
 
 void OnTriggerEnter(Collider other) 
 {
 if (other.tag == "Destroy")
 {
 _GameManager.GetComponent().Death();
 Destroy(gameObject);
 }
 else if (other.tag == "Coin")
 {
 Destroy(other.gameObject);
 _GameManager.GetComponent().FoundCoin();
 }
 else if (other.tag == "SpeedBooster")
 {
 movement = new Vector3(0,0,0);
 _GameManager.GetComponent().SpeedBooster();
 }
 else if (other.tag == "JumpBooster")
 {
 movement = new Vector3(0,0,0);
 _GameManager.GetComponent().JumpBooster();
 }
 else if (other.tag == "Teleporter")
 {
 movement = new Vector3(0,0,0);
 _GameManager.GetComponent().Teleporter();
 }
 }
 
 void OnCollisionEnter(Collision collision)
 {
 if (!canJump)
 {
 canJump = true;
 _GameManager.GetComponent().BallHitGround();
 }
 }
 }