Hi everyone, Im currently working my first stickman 2d indie game, and im stuck on the weapon system. I have figured out how to pick weapon up, but it doesn't work trying to throw the weapon.

Questions & Answers
1 
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Grab : MonoBehaviour
{
    [SerializeField] private float ThrowForce = 2f;

    private void Update()
    {   
        if(Input.GetKeyDown(KeyCode.K))
        {
            Destroy(GetComponent<FixedJoint2D>()); //Make sure to add fixedjointed2D and a rigidBody2D
        }
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {       
         if (collision.gameObject.CompareTag("Weapon"))
         {
            Rigidbody2D rb = collision.gameObject.GetComponent<Rigidbody2D>();
            if (rb != null)
            {
                FixedJoint2D fj = transform.gameObject.AddComponent(typeof(FixedJoint2D)) as FixedJoint2D;
                fj.connectedBody = rb;
            }
            else
            {
                FixedJoint2D fj = transform.gameObject.AddComponent(typeof(FixedJoint2D)) as FixedJoint2D;
            }
         }                                                                                                 
    }
    private void OnCollisionExit2D(Collision2D collision)
    {
        if(collision.gameObject.CompareTag("Weapon"))
        {
           
            Rigidbody2D rb = collision.gameObject.GetComponent<Rigidbody2D>();       
            //Weapon carries momentum of the players
            rb.velocity = gameObject.GetComponent<Rigidbody2D>().velocity;
            //Addforce
            rb.AddForce(transform.forward * ThrowForce, ForceMode2D.Impulse);
            
        }
    }
}