Show your work on the following problems from the end of Chapter 12. All are either net force or conservation of energy problems. Provide formal solutions. For Part B, you find it helpful to study these example solutions first.

Part A. Problems 6 and 8

Part B. Problems 50 and 63 (For problem 63, the phrase "same amount of mass in a given volume as the Earth" means that the two planets have the same density.)