Giancoli's Physics: Principles with Applications, 7th Edition
6
Work and Energy
Change chapter6-1: Work, Constant Force
6-2: Work, Varying Force
6-3: Kinetic Energy; Work-Energy Principle
6-4 and 6-5: Potential Energy
6-6 and 6-7: Conservation of Mechanical Energy
6-8 and 6-9: Law of Conservation of Energy
6-10: Power
Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 26
Q
By how much does the gravitational potential energy of a 54-kg pole vaulter change if her center of mass rises about 4.0 m during the jump?
A
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VIDEO TRANSCRIPT
This is Giancoli Answers with Mr. Dychko. Gravitational potential energy equals the weight of the object multiplied by the height above some reference level and we'll assume the reference level is the ground. And it's 4 meters up and so the pole vaulter is 54 kilograms times 9.8 newtons per kilograms times 4 meters, which is, 2100 joules of gravitational potential energy.
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