how to set maxspeed rigidbody unity code example

Example: how to set maxspeed rigidbody unity

using UnityEngine; using System.Collections;  [RequireComponent (typeof (Rigidbody))] public class NewBehaviourScript : MonoBehaviour {     public float maxSpeed = 10f;      void Update()     {         // Trying to Limit Speed         if(rigidbody.velocity.magnitude > maxSpeed){             rigidbody.velocity = Vector3.ClampMagnitude(rigidbody.velocity, maxSpeed);         }     }      void OnGUI()     {         GUI.Label(new Rect(20, 20, 200, 200), "rigidbody velocity: " + rigidbody.velocity);     }     }