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If a hole is drilled along the diameter ...

If a hole is drilled along the diameter of the earth and a stone is dropped into it. The stone :

A

reaches the centre of earth and stops

B

reaches the opposite end and stops

C

executes S.H.M. about the centre of earth

D

reaches the opposite side and escapes earth.

Text Solution

Verified by Experts

The correct Answer is:
C
A stone dropped in tunnel along the diameter of earth executes S.H.M. motion as acceleration is proportional to displacement from mean position is directed towards centre of earth.
At depth `d,g.=g(1-(d)/( R ))=g((R-d)/( R ))=g(y)/( R )`
Hence correct choice is ( c ).
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