The friction used when already moving. This value has to be between 0 and 1.

	collider.dynamicFriction = 1;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        collider.dynamicFriction = 1;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		collider.dynamicFriction = 1