Consider a particle of mass 'm' suspended by a string at the equator. Let 'R' and 'M' denote radius and mass of the earth. If 'w' is the angular velocity of rotation of the earth about its own axis, then the tension on the string will be (cos0º = 1)
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M,R are the mass and radius of the earth respectively
m is the mass of the particle which is suspended by the string at the equator
w is the angular velocity of rotation
There are in total 2 forces acting on the string one is the centrifugal force acting in outward direction and 2 nd is the gravitaional force
T = G Mm /r² - mv² /r
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