Which of the following physical quantities is not a vector? A) velocity B) acceleration C) weight D) mass

Answer: Option (D) is correct.

Explanation:

From the given options, we can state that mass is not a vector quantity. Mass is considered as a scalar quantity. In other words, mass can be referred to as from how much matter a subject is made of. Mass has magnitude but it does not tend to give any indications about the direction of the subject in frame.