慣かん性せい系けいかんせいけいじ字FuriganaMeanings1nouninertial frame of reference; inertial systemphysics›Physics term for a reference frame in which a body not subject to forces moves at constant velocity.ニュートンの第だい一いち法ほう則そくは慣かん性せい系けいでのみ成なり
