MHT CET Physics question

If a hole is bored along the diameter of the earth and a stone is dropped into hole, then

(A)The stone reaches the centre of the earth and stops there
(B)The stone reaches the other side of the earth and stops there
(C)The stone executes simple harmonic motion about the centre of the earthCorrect
(D)The stone reaches the other side of the earth and escapes into space

Answer: (C)

Solution

Inside the earth the gravitational force is , proportional to the distance from the centre and directed towards it, so the stone performs S.H.M. about the

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Question ID VK-068047