Make Object lookat velocity

 Vector2 dir = transform.rigidbody2D.velocity;
 float angle = Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg;
 transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);

I got this script from other forum. but when i attach it. the RigidBody2D.AddForce doesn't work. maybe someone can fix this?

i use addforce to pull player to a point.