Rigidbody.angularDrag

Description

Угловое торможение объекта.

Angular drag can be used to slow down the rotation of an object. The higher the drag the more the rotation slows down.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Rigidbody rb;
    void Start() {
        rb = GetComponent<Rigidbody>();
    }
    void Update() {
        if (Input.GetKeyDown("space"))
            rb.angularDrag = 0.8F;
        else
            rb.angularDrag = 0;
    }
}