The weight of an object is determined by __________.

• A. Mass and gravity's force
• B. Volume
• C. Temperature
• D. Inertia

Answer: (A)

Weight is the gravitational force acting on an object’s mass. It depends on two things: how much matter is there (mass) and how strong gravity is where you are (gravitational acceleration). The relationship is W = m × g. So, on Earth with g about 9.8 m/s^2, a 1 kg mass weighs about 9.8 N. Move to a place with weaker gravity, like the Moon, and the same mass weighs less even though the amount of matter hasn’t changed. Volume isn’t the determinant by itself; it relates to weight only through density—if you know the material’s density, volume can tell you mass and thus weight. Temperature doesn’t set weight in the usual sense, though tiny changes can occur due to air buoyancy or thermal expansion in specific conditions. Inertia is about resisting changes in motion and is tied to mass, not the gravitational force acting on it.