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

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The stone reaches the centre of the earth and stops there

The stone reaches the other side of the earth and stops there

The stone executes simple harmonic motion about the centre of the earth

The stone reaches the other side of the earth and escapes into space

answer is C.

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Detailed Solution

The stone execute S.H.M. about centre of earth with time period T=2πRg; where R = Radius of earth.

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