The earth has a radius of 6380 km and turns around once on its axis in 24 hours. (a) What is the centripetal acceleration of an object at the earth's equator? Give your answer in m/s and as a fraction of g. (b) If the centripetal acceleration of at the equator is greater than g, objects would fly off the earth's surface and into space. What would the period of the earth's rotation to start this fly off?

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.