Question

What is the force of gravity experienced by an object at the centre of the earth? (Assume that the earth is perfectly spherical)

(a) 0 g-force

(b) 1 g-force

(c) 9.81 g-force

(d) 10 g-force

I have been asked this question in an interview for job.

Query is from Universal Law of Gravitation in portion Gravitation of Physics – Class 11

Answer 1

The correct answer is (a) 0 g-force

Best explanation: Since a body at the centre of the earth would experience equal gravitational force from all sides, the vector addition of all of these forces amount to zero. Therefore, the force experienced by an object at the centre of the earth is zero.