Which quantity relies on mass and gravitational forces to provide a measurable value?

• A. Mass
• B. Volume
• C. Density
• D. Weight

Answer: (D)

Weight is the force that gravity exerts on a mass. Its magnitude comes from multiplying the mass by the local gravitational acceleration: W = m × g. This means weight depends on both how much matter there is and how strong gravity is, so it changes with location (different planets or altitudes) even though the mass stays the same. Volume is just the space an object occupies, and density is mass per unit volume; neither directly involves a gravitational pull to yield its value. The key idea here is that weight is a force produced by gravity acting on mass, and that’s what gives it a measurable value in newtons.