The discussion revolves around the analysis of maximum moment in a beam under various loads, specifically focusing on why the maximum moment is considered to occur under a 1.5k load. Participants explore the reasoning behind selecting specific loads for analysis and the implications of making imaginary cuts in the beam.
Participants express differing views on which loads should be considered in the moment analysis and the reasoning behind the assumption that the maximum moment occurs under the 1.5k load. The discussion remains unresolved regarding the best approach to determining the maximum moment.
Participants highlight the importance of understanding the locations of concentrated loads and their influence on the maximum moment, as well as the potential for confusion regarding the application of resultant forces.
if you look carefully, those are not the forces used when making an imaginary cutfonseh said:
the 4.5k load is the resultant sum of the applied loads, so you must not double count these loads.
but a cut after the 1k load is not the point of absolute maximum moment.
do you mean we just need to make an imaginary cut up to 1.5 k because the author assume the max moment will occur under the 1.5k load ?PhanthomJay said:
yesfonseh said:
Actually how did the author know that the absolute max moment occur under the 1.5k load ? why not the 1k load or 2k load ? Why did the author didnt show the calculation for the 1k load ?PhanthomJay said:
Author did not know. The point of max moment occurs under one of the concentrated loads near the resultant location. The author had to check both the 1.5 and 2k load locations to find out which controlled for max moment. The moment at the 1k load point did not have to be checked because it was not near the resultant.fonseh said:
