In the absence of gravitational force, the weight of the body is

Analyze the question: It asks what happens to a body's weight if there is no gravitational force acting on it.

Concept: Weight is the force with which gravity pulls a body toward the Earth (or any other mass).

W = mg

where:

• W = weight (measured in newtons, N)
• m = mass (measured in kg)
• g = acceleration due to gravity (m/s²)

Mass is the quantity of matter in a body. It stays the same everywhere. Weight depends on gravity, so it changes when gravity changes.

Solution:

1. With no gravitational force, g = 0.
2. Substitute into the formula: W = m × 0 = 0 N.
3. The body's mass, density and volume are unchanged, because they do not depend on gravity. Only the weight becomes zero.

Checking the options:

• A. Its mass: wrong. Mass is measured in kg and weight in N, so they are different quantities.
• B. Zero: correct, since W = mg and g = 0.
• C. Its density: wrong. Density is mass per unit volume and is unrelated to gravity.
• D. Its volume: wrong. Volume is the space a body occupies.

Tip: Mass is constant everywhere, but weight changes with gravity. Astronauts in deep space or in free fall feel "weightless" because the effective gravitational pull on them is nearly zero, even though their mass is unchanged. Whenever you see "no gravity" in a question, think W = mg → W = 0.