If anisotropic friction is enabled, dynamicFriction2 will be applied along frictionDirection2.

	collider.physicMaterial.dynamicFriction2 = 0;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        collider.physicMaterial.dynamicFriction2 = 0;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		collider.physicMaterial.dynamicFriction2 = 0