Motion
From Tardis Wiki, the free Doctor Who reference
While his mind was within the time brain, Albert Einstein stated that "it is a fundamental postulate that all motion is relative", to which the Seventh Doctor responded that he would not say that if he had met the Doctor's uncle. (TV: Time and the Rani)
According to K9 Mark II, Newton's Third Law of Motion stated that "action and reaction are equal and opposite." (TV: Warriors' Gate)
