1. The problem statement, all variables and given/known data By considering the centripetal force acting on a man, calculate the minimum period of rotation that the Earth would need to have about its axis if a man at the equator were to experience zero normal contact force. Take radius of Earth=6400km 2. The attempt at a solution this means the g=Fc(centripetral force) to find v= square root of ( radius of the Earth and g) g=9.81 N/kg and then sub it to T= (2pie x radius of Earth )/v Where is the error? Does a zero normal force means the person is experiencing weightlessness due to a=g?