1 A satellite of mass 66 kg is in orbit round the Earth at a distance of 5.7R above its surface, where R is the value of the mean radius of the Earth. If the gravitational field strength at the Earth's surface is 9.8 Nkg ', calculate the centripetal force acting on the satellite. Assuming the Earth's mean radius to be 6400 km, calculate the period of the satellite in orbit in laours. [L]

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