GameObject.rigidbody

Description

Прикрепленный Rigidbody к данному GameObject'у (Read Only). (null, если компонент не прикреплен).

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);
    }
}