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HOMEWORK 26.B - SP 24
15 thoughts on “HOMEWORK 26.B - SP 24”
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What is the purpose of parameter "d" in this problem?
I was wondering the same thing, I just ignored it and focused on finding the moment at D due to P and location B for now.
Since we assume the wrench has negligible mass, we can also assume the thickness does not matter either.
As the wording of the problem asked us to ignore it I believe it's irrelevant and is probably something that could be used in future problems instead.
I would assume so as well. I feel like the problem would've clearly articulated if it was necessary
It might be some sort of signifier for center of mass perhaps? But I don't think it's necessary for this question.
The parameter "d" is not provided in this problem statement, so I'd assume it is irrelevant to the solution.
Does the mass of the socket wrench matter? There is not a mass given, however in other similar problems a mass/length is given.
No, the mass of the socket wrench can be ignored in this problem
The mass of the socket wrench is negligible in the problem. This is different from other problems as those ones will include the mass or weight to add complexity.
I am kind of confused the question. I just solved the problem with all the reaction forces and moment at B by treating only wrench BD. The bottom line was I came up with (Mb)x = sth, (Mb)y = sth, (Mb)z = sth. Am I on the right track?
I believe you have to take into account the entire side of the wrench to the right of B (so the portion from B to D and the portion from D to C), otherwise you would have some unknown internal reactions at D.
Should we be provided with length of OB? From my understanding, if we want to find the bending moment at B, we need to use the sum of moment at B. This requires the length of OB. Please correct me if I am wrong!
When you section the wrench at B to find the internal reactions, you could use the section to the left of B to find the internal reactions, in which case you would need the distance OB to sum the moments. However, if you instead sum the moments from the section to the right side of B, you don't need the distance OB.
To do this problem don't consider what is left of point B. Consider the reaction and moments at point B. To sum the moments and reactions at B separately, Use the position vector of the force crossed with the magnitude and direction of the force to determine the moment vector.