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# Ch4 HW2 - Ch4 HW2...

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Ch4 HW2 (Homework) BRANDON JARROTT FELDKAMP PHYS 2211, section M, Fall 2008 Instructor: Jennifer Curtis Web Assign Current Score: 26 out of 27 Due: Wednesday, September 17, 2008 09:00 AM EDT Description Ball-spring model of a solid; tension forces; length of interatomic bond. Instructions Reading: Sec. 4.1-4.4 The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. [MI2 04.X.00] 6/6 points A climber whose mass is 56 kg hangs motionless from a rope. What is the tension in the rope? tension = 9.8*56 549 N Later, a different climber whose mass is 84 kg hangs from the same rope. Now what is the tension in the rope? tension = 84*9.8 823 N Compare the physical state of the rope when it supports the heavier climber to the state of the rope when it supports the lighter climber. Which statements about the physical state of the rope are true? Check all that apply. Because the same rope is used, the tension in the rope must be the same in both cases. The rope is slightly longer when it supports the heavier climber than when it supports the lighter climber. The interatomic bonds in the rope are stretched more when the rope supports the haevier climber than when the rope supports the lighter climber. 2. [MI2 04.X.00.01] 3/3 points Ch4 HW2 http://www.webassign.net/[email protected]/student.pl?b=2008... 1 of 5 11/18/2008 6:20 PM

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Why are two balls connected by a spring a good model for two atoms connected by a chemical bond?
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