question_answer

If a body is released into a tunnel dug across the diameter of earth, it executes simple harmonic motion with time period                                                         [CPMT 1999]

A)            \[T=2\pi \sqrt{\frac{{{R}_{e}}}{g}}\]                              

B)            \[T=2\pi \sqrt{\frac{2\,{{R}_{e}}}{g}}\]

C)            \[T=2\pi \sqrt{\frac{{{R}_{e}}}{2g}}\]                            

D)            \[T=2\] seconds