he height d. Gwen Stacy, 45 kg, is thrown off a building that all has a measures 100m high. Spiderman tries to save her Calculate when she is half-way down. At that moment, what is Gwen Stacy's velocity? orgy Initial Energy Final Energy Energy Flow Esp Ediss KE PE PESp Diagram KE PEg PEsp Ediss O A. Equation Setup (start with the conservation of energy)