E\" The superheroine Xanaxa, who has a mass of 66.9 kg, is pursuing the 78.] kg arehvillain Lexlax. She leaps from the ground [0 E the top of a 191 In high building then dives off it and comes to rest at the bottom of a 13.1 In deep excavation where she nds Lexlax and neutralizes him. (9 Macmillan Lea Does all this bring about a net gain or a net loss of gravitational potential energy