2007 Spring Posted by D. Dane Quinn on Fri 01 of Jun, 2007 11:14 EDT A compilation of all Spring 2007 posts...

2007 Spring Posted by D. Dane Quinn on Fri 01 of Jun, 2007 11:14 EDT A compilation of all Spring 2007 posts...

Posted by AndrewS on Mon 07 of May, 2007 09:58 EDT Are the solutions to the multi dof problems in that last set of homework probems to study going to be posted today so we can work some of those problems?

Posted by D. Dane Quinn on Mon 16 of Apr, 2007 16:00 EDT news and information about our second gathering... <ul> <li>The second exam will be tomorrow, starting at 8:45am in SHS 126;</li> <li>A revised cheat sheet is now available. Comments are always welcome;</li> <li>The solutions for the last homework are up, although as of 4:00pm problem 1 was not complete.</li> </ul>

Posted by AndrewS on Mon 26 of Feb, 2007 19:40 EST Sometimes we consider the wieght of blocks (-mgj) and sometimes we don’t to find eqns of motion. How can you tell when you are or are not supposed to include gravity force??? Also, in one of his problems (Spring “03” exam 1 Problems 2 & 5) in one of the steps a new coordinate is defined measuring the displacement of the system from static equil. Does anyone know when/ why/ how to use this??

Posted by BipBapBoop on Mon 26 of Feb, 2007 19:05 EST Can anyone confirm that the test is in Shrank Hall S. room 145 ? thanks in advance

Posted by Patrick Vielhaber on Mon 26 of Feb, 2007 18:57 EST > For a problem like the last homework the quarter car, is the solution > always the same x(t) = exp(-zeta*wn*t) (Acos(wd*t)+ Bsin(wd*t)) and > then solve the A and B from inition conditions, and wd changes with the > value of zeta? > > I see on the cheat sheet it has different formulations of zeta, but I > can’t seem to get how the general equations are set up unless this is > general for all of them. If you can help shed any light on this (I > don’t need you to reteach me everything), I just don’t understand w/out > doing the dq every time where someone has general equations for if > we’re given in like Problem 4 of Homework 4 where we know meq beq keq > what form... thanks