science

posted by Ioba Bolwary Marak

How much below the surface of the earth does the acceleration due to gravity become 1percent of its value at the earth surface? The earth is assume to be a sphere of radius 6.4×10^6m.

  1. Steve

    Beneath the surface, gravity is basically a linear function of the radius. So, at 1/100 the radius, g is reduced by a factor of 1/100

    See the discussion here:

    http://physics.stackexchange.com/questions/99117/why-gravity-decreases-as-we-go-down-into-the-earth

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