Solve the following problem:
Problem I: At what height above the earth is the free-fall acceleration 25 % of its value at the surface? Assume Rearth = 6.37 × 106 m.
Problem II: What is the speed of a satellite orbiting at that height? Assume Mearth = 5.98 × 1024 kg.
Can someone please explain what the heck is going on above problem?