GameObject.rigidbody

설명

The Rigidbody attached to this GameObject (Read Only). (Null if there is none attached).

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public GameObject other;
    public Rigidbody rb = other.GetComponent<Rigidbody>();
    void Example() {
        rb.AddForce(1, 1, 1);
    }
}