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Q-5. Give scientific reason: why the …

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Q-5. Give scientific reason: why the weight of an object at the equator is less then at the poles?

    • Posted by Arun Kushwah 4 years, 6 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sia ? 4 years, 6 months ago

    There are 2 resons for which the weight at equator is less that of poles :

    1. Rotation of the earth:

    The general equation for gravitational acceleration at various latitudes can be given as:

    • r is radius of earth ,  is angular velocity of earth and  is angle of latitude.

    Now, at equator , value of  =0°, but at poles = 90° , so we can say:

    • Since the gravitational acceleration at the equator is less than that of the poles an object will have lesser weight at the equator.

    2. Spheroidal shape of earth:

    • The it is not completely spherical and the radius at the equator is slightly greater as compared to that of the poles.
    • That is why , the gravitational acceleration at the equator is slightly less as compared to that of the poles.
    • And hence the weight is lesser at the poles.

    0Thank You

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