POWER(linear): Units 10 & 11 Dr John P. Cise, Professor of Physics, Austin Community College, 1212 Rio Grande St., Austin Tx. 78701
[email protected] & NY Times May 17, 2015 by John Branch Dean Potter, Extreme Climber, Dies in Base-Jumping Accident at Yosemite Dean Potter, one of the generation’s top rock climbers and charismatic personalities, was one of two men killed in a BASE-jumping accident at Yosemite National Park in California on Saturday. Potter, 43, and the other man, Graham Hunt, 29, leapt near dusk off Taft Point, a promontory about 3,000 feet above the floor of Yosemite Valley, not far from the iconic granite masses of El Capitan and Half Dome. Flying in wingsuits, they tried to clear a notch in the granite cliffs but instead smashed into the rocks in quick succession. “It’s tremendously sad,” said Gauthier, an occasional climbing partner of Potter, who lived in Yosemite. “Dean was part of this community and had such an impact on climbing. He was a luminary and in the pantheon of climbing gods.” INTRODUCTION: Half Dome mountain at left in Yosemite National Park is 4800 feet from valley floor to summit. QUESTION: (a) How much gravitational potential energy did Dean Potter gain in climbing Half Dome? Do in English system (b) How much work did he do during this 4800 ft. climb? (c) Convert 1 hr + 19 min. to seconds? (d) How powerful was Dean during the climb? (in units of ft. lb./s) . (e) Find his Dean Potter was one of two men killed while BASE jumping in Yosemite National Park.