1.

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


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