23. The variation of gravitational acceleration g with altitude y is given by g R² (R+ y)280 where R = 6371 km is the radius of the earth, and go = 9.81 m/s² is the gravi- tational acceleration at sea level. The change in the gravitational potential energy, AU, of an object that is raised from the earth is given by: AU = ["mgdy Determine the change in the potential energy of a satellite with a mass of 500 kg that is raised from the surface of the earth to a height of 800 km.

23. The variation of gravitational acceleration g with altitude y is given by g R² (R+ y)280 where R = 6371 km is the radius of the earth, and go = 9.81 m/s² is the gravi- tational acceleration at sea level. The change in the gravitational potential energy, AU, of an object that is raised from the earth is given by: AU = ["mgdy Determine the change in the potential energy of a satellite with a mass of 500 kg that is raised from the surface of the earth to a height of 800 km.