An undiscovered planet, many lightyears from earth, has one moon in a periodic orbit. this moon takes time tt on average to complete one nearly circular revolution around the unnamed planet. if the diameter of the moon's orbit is , calculate the moon's radial (or centripetal) acceleration .

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000