4. A block of mass m= 5.00 kg is released from rest from point A and slides on the frictionless track shown in in the diagram. Determine (a) the block's speed at points
B and C and (b) the net work done by the gravitational force on the block as it
moves from point from A to C.​

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.