public Rigidbody rigidbody ;


The Rigidbody of the collider that was hit. If the collider is not attached to a rigidbody then it is null.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public float hitForce; void Update() { if (Input.GetMouseButtonDown(0)) { RaycastHit hit; Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, out hit)) if (hit.rigidbody != null) hit.rigidbody.AddForce(ray.direction * hitForce); } } }