MHT CET Physics question

If a hole is drilled along the diameter of the earth' and you leave a coin in the hole, then

(A)it falls off and leaves the earth
(B)it falls off and finally stops at the centre of the earth
(C)it falls off but does not leave the earth
(D)it falls and comes back to youCorrect

Answer: (D)

Solution

Inside the earth the gravitational force on the coin is proportional to its distance from the centre and directed towards it, so the coin performs SHM through the centre to

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Question ID VK-067590