how disable/enable rigidbody and box collider

Questions & Answers
1

I am trying to make an object, that when told starts falling, and after a designated length of time respawns where it was before, but for some reason, my rigidbody and collider are not re-enabling, here is my code:

public float respawnDelay;
public float WaitTime;

public GameObject ground;

public Rigidbody2D rb;

public Collider2D goingThroughObjects;

private Vector3 whereToTeleport;

// Use this for initialization
void Start ()
{
    rb = GetComponent<Rigidbody2D>();

    goingThroughObjects = GetComponent<Collider2D>();

    rb.isKinematic = true;
    goingThroughObjects.enabled = true;
}

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

void OnTriggerEnter2D(Collider2D other)
{
    if(other.tag == "HeadStomp")
    {
        StartCoroutine("TouchedBreakableObjectCo");
    }

}

public IEnumerator TouchedBreakableObjectCo()
{
    whereToTeleport = ground.transform.position;
    yield return new WaitForSeconds(WaitTime);
    rb.isKinematic = false;
    yield return new WaitForSeconds(0.2f);
    goingThroughObjects.enabled = false;
    yield return new WaitForSeconds(respawnDelay);
    rb.isKinematic = true;
    goingThroughObjects.enabled = true;
    ground.transform.position = whereToTeleport;
}

PLEASE HELP

2

You set the RB to IsKinematic = true in Start(), but you use OnTriggerEnter2D() to try and register collisions, which is not possible with a non-kinematic RB.