Question

Why is the weight of a body zero at the centre of the earth​

Answer 1

Answer:

The weight of a body placed at the centre of the earth is zero. This is because the mass at the exact cenrte of the earth is zero. Gravitational force exists only if there is mass in the object.

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Answer 2

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The weight of the body is the force with which it is attracted towards the centre of the earth.

W = m × g

Weight of the body changes from place to place, as the value of g changes from place to place.

Acceleration due to gravity g is zero at the centre of earth, as at the centre of earth we are surrounded by equal masses in all the direction, hence equivalent gravitational force acting on us due to earth is zero and thus making acceleration due to gravity to zero.

So, W = m × g = 0

Hence, weight at the centre of earth is zero.

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