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A body is dropped in a hole drilled acro...

A body is dropped in a hole drilled across diameter of the earth. Show that it executes SHM Asuume earth to be a homogenous sphere, find the time period of its motion. Given density of earth is `5.51 xx10^(3)Kgm^(-3)` and `G=6.67xx10^(-11)Nm^(2)kg^(-2)`

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