Mass is not weight

By Physics you can picture · myAudience

myAudience · AI-generated illustration · Original generated illustration; not documentary evidence

Mass measures inertia and is expressed in kilograms. Weight is a gravitational force, expressed in newtons: W = mg. Near Earth’s surface, using g ≈ 9.8 m/s², a 2 kg mass has weight about 19.6 N. Its mass would stay the same on the Moon, while its weight would change. Always write the units: they help distinguish quantities that ordinary conversation often mixes together.