Joint2D.attachedRigidbody

Description

The Rigidbody2D attached to the Joint2D.

Joint2D are automatically attached to a Rigidbody2D on the same GameObject as the Joint2D.

Additional resources: Rigidbody2D.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Vector2 force = Vector2.up;

    void Start()
    {
        // Apply a force to the rigidbody attached to the joint.
        GetComponent<Joint2D>().attachedRigidbody.AddForce(force);
    }
}