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estimate the rotational kinetic energy of earth, assuming it to be a solid sphere of uniform density

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    The rotational kinetic energy of a spinning sphere is given by
    K = (1/2)Iω²
    where
    K=kinetic energy due to rotation
    I=moment of inertia about the rotation axis
    ω = angular velocity

    The moment of inertia of a sphere spinning about an axis passing through its centre, I is
    I=(2/5)mr²
    Where m=mass of the sphere,
    and r=radius of sphere.

    Calculate K.

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