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ch 6 hw 5

ch 6 hw 5 - Ch6 HW5 f10 Page 1 of 5 WebAssign Ch6 HW5...

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Web Assign Ch6 HW5 f10 (Homework) Ashlyn Baum Physics 303K, section B, Fall 2010 Instructor: Jim Chelikowsky Current Score : 25 / 25 Due : Wednesday, October 20, 2010 11:30 PM CDT 1. 6/6 points Question: MI3 6.11.X.078 The diagram below is a graph of the energy of a system of a planet interacting with a star. The gravitational potential energy U g is shown as the thick curve, and plotted along the vertical axis are various values of K+U g . Suppose that K+U g of the system is A . Which of the following statements are true? The due date for this assignment is past. Your work can be viewed below, but no changes can be made. View Key The system is a bound system; the planet can never escape. The kinetic energy of the system is greater when the distance between the star and planet is r 1 than when the distance between the two bodies is r 2 . The potential energy of the system decreases as the planet moves from r 1 to r 2 . When the separation between the two bodies is r 2 , the kinetic energy of the system is ( B - C ). The planet will escape. When the separation between the two bodies is r 2 , the kinetic energy of the system is ( A - B ). Page 1 of 5 Ch6 HW5 f10 11/21/2010 http://www.webassign.net/[email protected]/[email protected]

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