Question

mass of a body is constant but weight varies place to place. why?​

Answer 1

The weight of an object at the Earth's South Pole is slightly more than its weight at the Equator because the polar radius of the Earth is slightly less than the equatorial radius. ... Though the mass of an object remains constant, its weight varies according to its location.

Answer 2

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Mass of the body is a fundamental quantity.

Its value remains same at all places. Mass of a body is defined as the quantity of the matter in the body, which can never be zero.

Whereas, weight of a body at a place depends upon the mass and the value of acceleration due to gravity (g) at that place.