unity rigidbody copy position code example

Example 1: rigidbody2d unfreeze position

public Rigidbody2D rb;

void Start()
{
	rb.constraints = RigidbodyConstraints2D.None;
}

Example 2: unity move with rigidbody.moveposition

rb2D.MovePosition(rb2D.position + velocity * Time.fixedDeltaTime);