Question

What is the weight of an object ? Discuss
the variation of the weight of an object due to
variation in the gravitational acceleration.​

Answer 1

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The weight of an object is the force with which the Earth attracts that object. If m is the mass of an object and g is the gravitational acceleration, the weight W of the object is

W= mg

(a) Above / below the Earth's surface :

i) an object is raised to an altitude h above the Earth's surface, the gravitational acceleration decreases and hence the weight of the object reduces.

ii) If an object is taken to a depth d below the Earth's surface, the gravitational acceleration decreases and hence the weight of the object reduces.

(b) On the Earth's surface :

(i) The gravitational acceleration at the equator is minimum and hence the weight of the object there is also minimum.

(ii) The gravitational acceleration is maximum at the poles and hence the weight of the object there is also maximum

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