A 2 kg stone thrown vertically from the top reached a height of 3 m and fell at the point of shooting. What is the potential energy of the stone at the start of the movement towards the starting location and at the highest point of the shot?

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.