What is the change in gravitational potential energy of a 65.5 kg astronaut lifted from Earth’s surface into a circular orbit of altitude 4.50 x 10^2 km?

A 342 kg satellite currently orbits the Earth in a circle with radius 6.51x10^7m. The satellite must be moved to a new circular orbit of radius 8.22x10^7m. Calculate the additional total mechanical energy that the satellite requires. The mass of the Earth is 5.97x10^24kg G is 6.67x10^-11Nm^2/kg^2

Two Earth satellites, A and B, each of mass m, are to be launched into circular orbits about Earth's center. Satellite A is to orbit at an altitude of 5390 km. Satellite B is to orbit at an altitude of 22500 km. The radius of Earth REis 6370 km. (a) What is the ratio of the potential energy of satellite B to that of satellite A, in orbit? (b) What is the ratio of the kinetic energy of satellite B to that of satellite A, in orbit? (c) Which satellite (answer A or B) has the greater total energy if each has a mass of 11.7 kg? (d) By how much?

A planet with a radius of 6.00 × 107 m has a gravitational field of magnitude 40.2 m/s2 at the surface. What is the escape speed from the planet? ____km/s