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  4. A box weighs 196 N on a spring balance at the north pole. Its weight recorded on the same balance if it is shifted to the equator is close to (Take g=10 ms-2 at the north pole and the radius of the earth = 6400 km) :

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Q. A box weighs $196 \,N$ on a spring balance at the north pole. Its weight recorded on the same balance if it is shifted to the equator is close to (Take $g=10\, ms^{-2}$ at the north pole and the radius of the earth $= 6400\, km$) :

JEE MainJEE Main 2020Gravitation

Solution:

$W = 196 - m\omega^{2}$