Question

The mass of an object is

• A. measured by its inertia
• B. constant at all places
• C. scalar quantity
• D. vector quantity

Answer 1

Answer: (A), (B), (C)

scalar quantity

Properties of mass of object:

1. A fundamental property of the object is the mass of an object; a numerical measure of its inertia; a fundamental measure of the amount of matter in the object.
2. Mass is usually denoted by the symbol $m$and its SI unit is the kilogram (Kg). Mass is normally considered to be that property of an object which does not change.
3. Mass and energy are scalar quantities and scalar quantities are those which have only magnitude but no direction.
4. Mass remains constant at all places on the surface of the earth, only weight changes due to change in the acceleration due to gravity.

Hence, Option (a), (b), (c) are the correct answers.