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    Density remaining constant if earth contracts to half of its present radius duration of the day would be in minutes

    Saiprasad 27th May, 2019
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    Answer (1)
    Ayush Jain 4th Jul, 2019

    Using conservation of angular momentum

    2/5 mR²w= const.

    I(w), wR², 2πfR², R²/T  =const.

    so, T is directly proportional to square of radius

    Now if radius is decreased to half then,

    T'= T/4

    therefore which is 24/4

    which implies that the time period will be 6 hours.

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