if a boby is released into a tunal dug ...

if a boby is released into a tunal dug across the diameter of earth, it executes simple harmonic motoin with time period

`T=2pi sqrt((R_(e))/(g)`

`T=2pi sqrt((2R_(e))/(g)`

`T=2pi sqrt((R_(e))/(2g)`

` T= 2` seconds

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