Which one of the following statements is correct?

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Weight of an object may vary from place to place but its mass remains constant.

Mass of an object may vary from place to place but its weight remains constant.

Both weight and mass of an object do not vary from place to place.

Both weight and mass of an object vary from place to place.

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UPSC CISF-AC-EXE – 2021

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Mass is an intrinsic property of an object, representing the amount of matter it contains. It remains constant regardless of location. Weight, on the other hand, is the force exerted on an object due to gravity (Weight = Mass x gravitational acceleration). Since gravitational acceleration varies slightly depending on altitude, latitude, and local geological features, and significantly on different celestial bodies, the weight of an object can vary from place to place, while its mass remains constant.

– Mass is the amount of matter; it is constant.
– Weight is the force of gravity (mass x gravity); it varies with gravity.
– Gravitational acceleration varies from place to place.

On the surface of the Earth, the variation in gravitational acceleration is small, so the variation in weight is also relatively small. However, the distinction between mass and weight is fundamental in physics. On the Moon, an object has the same mass as on Earth but weighs significantly less because the Moon’s gravity is weaker.

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