The default linear velocity, below which objects start going to sleep (default 0.15). Must be positive.

See Rigidbody Sleeping for more information. This value can be overridden per rigidbody using Rigidbody.sleepVelocity.

This value is usually changed in Edit->Project Settings->Physics inspector instead of from scripts.

	Physics.sleepVelocity = 0.1;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        Physics.sleepVelocity = 0.1F;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		Physics.sleepVelocity = 0.1F