There is a moon orbiting an Earth-like planet. The mass of the moon is 5.49 × 1022 kg, the center-to-center separation of the planet and the moon is 2.32 × 105 km, the orbital period of the moon is 21.2 days, and the radius of the moon is 1710 km. What is the angular momentum of the moon about the planet?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.