Which quantity remains constant regardless of location?

• A. Weight
• B. Neither mass nor weight
• C. Both weight and mass
• D. Mass

Answer: (D)

Mass remains constant regardless of location. It measures how much matter an object contains and is an intrinsic property, unaffected by gravity, altitude, or where you are. Weight, on the other hand, is the force of gravity acting on that mass, so it changes with the local gravitational field. The relationship is W = m g, meaning if gravity changes, weight changes, even though the mass stays the same. For example, the same 5 kg object would weigh about 49 N on Earth but only about 8 N on the Moon, where gravity is weaker, while its mass remains 5 kg in both places.