to solve for the missing quantities (Ei = Ef). Draw an arbitrary LOL Diagram, solve for unknown value. the top of a b. A ball of unknown mass, is rolled down the top of f 8 J relative to hill that measures 5 meters high. If the ball has 1 1 J 's speed at the of kinetic energy at the bottom, calculate the mass of the ball. inal Energy Initial Energy MAN. Final Energy Energy Flow PEg PEsp Ediss KE PEg PEsp Diagram KE PE. PEsp Ediss ball earth 0 Equation Setup (start with the conservation of energy): 2 1 V 2 the height d. Gwen Stacy, 45 kg, is thrown off a building that ball has a measures 100m high. Spiderman tries to save her s, Calculate when she is half-way down. At that moment, what is Gwen Stacy's velocity