# Ch 6 hw 4 - Ch6 HW4 f10 Page 1 of 5 Ashlyn Baum Physics 303K section B Fall 2010 Instructor Jim Chelikowsky WebAssign Ch6 HW4 f10(Homework Current

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Web Assign Ch6 HW4 f10 (Homework) Ashlyn Baum Physics 303K, section B, Fall 2010 Instructor: Jim Chelikowsky Current Score : 27 / 27 Due : Sunday, October 17, 2010 11:30 PM CDT 1. 1/1 points Question: MI3 6.8.X.016 Consider an isolated system, by which we mean a system free of external forces. If the sum of the particle energies in the system increases by 152 joules, what must have been the change U in the system's potential energy? U = -152 -152 J Solution or Explanation ( E particles + U ) = W ext Here, W ext = 0 because the system is isolated, so neccesarily U = - E particles . 2. 8/8 points Question: MI3 6.9.X.077 The diagram above shows the path of a comet orbiting a star. You will be asked to rank order various quantities in terms of their values at the locations marked on the path, with the largest first. You can use the symbols ">" and "=". For example, if you were asked to rank order the locations in terms of their distance from the star, largest first, you would type: "A > B > C > D > E" Rank order the locations on the path in terms of the magnitude of the comet's momentum at each location, starting with the location where the magnitude of the momentum is the largest: e>d>c>b>a E>D>C>B>A Rank order the locations on the path in terms of the comet's kinetic energy at each location, starting with the location where the kinetic energy is the largest: e>d>c>b>a E>D>C>B>A Consider the system of the comet plus the star . Which of the following statements are correct? The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Page 1 of 5 Ch6 HW4 f10 11/21/2010 http:[email protected][email protected] ..

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## This note was uploaded on 11/21/2010 for the course PHY 56665 taught by Professor Chelikowsky during the Fall '10 term at University of Texas at Austin.

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Ch 6 hw 4 - Ch6 HW4 f10 Page 1 of 5 Ashlyn Baum Physics 303K section B Fall 2010 Instructor Jim Chelikowsky WebAssign Ch6 HW4 f10(Homework Current

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