関連ワード:  speed is not a scalar quantity    speed is not a scalar quantity. true false    speed is not a vector quantity    velocity is not a scalar quantity    speed is not a vector quantity true or false    velocity is not a vector quantity    average velocity is not a vector quantity    which is not a scalar quantity speed distance displacement power    speed is a scalar quantity and does not keep track of what    which of the following is not a scalar quantity speed time distance acceleration