Support Definition and 370 Threads

Homework Statement I have problem with the carried over factor in photo 670 . It's not stated the type of support at point A , B , C , D and E . But , at joint at A and E , it's fixed support because the author use distribution factor of 1 at A and E ( in photo 669) Homework EquationsThe...

WTH?

Homework Statement Solve for support reactions of a rigid, rectangular steel frame sitting on rubber pads at the four corners (See attached), when a shear force and a moment is applied at some point on the frame. All the known variables are shown in black while the unknown are in red. It is a...

In another thread, that is now closed, someone said that 1000's of experiments support the proposition that a particle can be in two, mutually exclusive states at the same time. The results of experiments show just the opposite. The measured result is not a superposition state. They never...

I recall that a few years ago NASA awarded a contract for a "new" kind of propulsion, the details of which I have forgotten, and I would like to find any old news announcement about this from about the time of this award. My memory includes that the NASA contract to study this "new" method of...

I have a project of more than 40 floors in height, in which the cables go from ground floor to each of the floors (1 tube 2-1/2" PVC + 4 conductors THHN 3/0 + ground in the higher floors ) The designer recommends the use of OZ / GEDNEY type S cable clamps with pozi-grip These supports are very...

Hey guys, from the figure, I was planning to put a truss (shaded in the figure) to support the fascia, due to the fascia being too high (3m) and it may be unstable, thus adding the additional truss support. But my question is how do I calculate if that shaded truss is enough to support the...

In OMP why the 'support' of the received signal is not found in one step, by selecting the $K$ maximum correlated columns of the sensing matrix $A$? where $K$ is the sparsity of the signal. Like in MATLAB [val ind] = sort(A'*Y); %Y is received signal signal_Support = ind(1:K)...

sorry if this is in the wrong spot or what not So my school has this robotics club and we need to build a robot to climb a rope as well as do other things. But focusing on the rope climbing I need to design 2 plates that can support the weight of the robot (~150lbs) The plates themselves are...

Homework Statement In i ) I was told that for the pinned support , we can assume to replace it with a roller , while for the cantilever , we can assume it to be supported by double roller . For the cantilever , why we can't replace it with roller instead of double roller ? What 's the...

I'm building a structure that will weigh approximately 200lbs (100kg) but that is only for the shell of the structure. So to support it I want something strong with as little deflection as possible as well as being as light weight as possible and I've narrowed down my options to PVC piping or...

Homework Statement why the number of reaction is 3 ? How to know that ? shouldn't the total number of reaction = 8 ? Homework EquationsThe Attempt at a Solution There are 4 pinned support in the structure . Each pinned support can support vertical and horizontal reactions...

Homework Statement The modulus of elasticity of each member is E = 20kN/(mm^2) and the cross section of each member is 1000(mm^2) , except member EB and EC is 40(mm^2) , determine : a) The vertical displacement at joint C b) The horizontal dispalcemnet at joint C at A , it's a pinned...

First off, I am new to this forum.. However I wanted To find out if anyone would be able to help me calculate How much a steel bar (2 in. In diameter, 5 ft. Lengthwise) Would be able to hold up without bending?

I have an idea on placing mini turbines(just taking its principle into account) to water flow to over head tank and i have thought of generating electricity,so kindly help me with some technical help,what amount of power can be generated through this?

Homework Statement I'm asked to find the VA and VB in this question . Homework EquationsThe Attempt at a Solution Here's my working : VA +VB =1000(6) =5000+0.5(400x3) VA +VB = 11600 total moment about A = 0 , sum of moment about A = 5000(6) -9000 + (4000/2)(9 +3(2/3) ) -VB(9) =0 hence VB...

My instructor asked us to create a binary search tree in python that supports variables. i.e. the tree will have variables inside, and the user can get the values for those variables by looking for the name of that variable. I don't really know how to implement this. What I have so far: class...

Greetings to all, I am doing FEA analysis of a jib crane. I am using Autodesk Inventor. The results show that the max Von Mises stress in the support pin is 773 MPa. This value exceeds the yield strength of the Carbon Steel. Does this mean that the Pin will fail under load ?

Hi all, After a major in physics (European university), a PhD in AMO physics (laser matter interaction) I am in the beginning of my 3rd postdoctoral position. I have been always studying laser interaction (from moderate to strong intensities) with molecules , atoms and (for a while surfaces). I...

Hi, I need to figure out how much weight a 5 foot steel pipe will support before becoming unsafe. I am building a series of out door pull up bars for my neighborhood as an eagle project. I need to buy the right pipe/tube that will be sturdy enough but not have too big of a diameter that you...

Hello. I am using Linux platform to do Embedded System Programming. I want to know the name of Integrated Development Environment software that runs on Linux or Windows (via Wine on Linux) and that has support for MATLAB and any circuit simulation software. Also, please let me know a good...

Homework Statement in the notes , why did the author only stated that zero displacement occur at pin and roller support? Why the author didnt stated that the slope at pin and roller support is also = 0 ? Homework EquationsThe Attempt at a Solution As we can see from the figure, the gradient...

Hi all, In the attached photo, you can find a plate supported along the edge by "frictionless" support and I am trying to obtain the stiffness matrix using the node at the center. I wonder why the Kxx and Kyy (highlighted) are not equivalent or even near to each other, any suggestions?

Homework Statement I'm having problem of finding the support reactions of Va , Vb and Vc Homework EquationsThe Attempt at a Solution My working is VA +VB +VC = 10+5(3) VA +VB +VC = 25 But , when i sub in the value of VA , VB and VC , it doesn't satisfy the equation of VA +VB +VC =...

Homework Statement A 60kg object placed 1m from B is drawn across a beam laid down across two support points. Support point A can only withstand 600N of force before giving way. Support point B is assumed to be capable of withstanding any amount of force. The beam is 6m in length and weighs...

Homework Statement The plate has a dimension of 460mm X 260mm, subjected to a central load of 400N. Determine the reaction A and B, each representing a roller support as a wheel, located at the center of one edge. (opposite blue arrows have the same resultant value.) Are they the same ? If not...

Homework Statement Give 2 reasons which give support for the quark substructure of protons and neutrons Homework EquationsThe Attempt at a Solution My first reason was due to the fact that in deep elastic scattering of the electron from a proton, the analysis of the structure function...

This new research suggesting Debroglie/Bohm pilot wave theory may yet have legs sounded compelling and I would love to hear the thoughts of the PF community: https://www.quantamagazine.org/20160517-pilot-wave-theory-gains-experimental-support There is some discussion in the comments by Wiseman...

If I am doing a simple, static analysis on something like a table, or tripod with a vertical force acting on it, what support condition do I assign to the base at which the legs contact the ground? I feel like it is incorrect to specify this as "fixed," since that would be like saying the legs...

Hi there, Wifi uses either 2.5 GHZ band or 5 Ghz band and these bands lie in Microwave in EM spectrum. As i read in books, Microwaves are propagated using line of sight (LOS) technique, so sending and receiving antennas should need to be aligned accordingly. But WiFi signals are broadcasted...

I am aware of the theory of stellar nucleosynthesis, but what evidence do we have to support this theory? Sources are very much appreciated. Thanks!

I am preparing for a qualifying exam for my PhD program and am looking at some of the old tests from previous years (as supplied by the school for study/prep material). I have come across a deflection problem that has me stumped, and I might just be overthinking it. The problem:

Homework Statement why the fluid need the wall to eliminate the shear stress? Homework EquationsThe Attempt at a Solution is it because if there is no wall to support teh fluid , the fluid would move continously , resulting the shear stress act on water?

Doesn't this paper support Penrose's OR theory? Universal decoherence due to gravitational time dilation Now Penrose being a very smart guy having realized that he has taken a realist standpoint on Quantum Mechanics very well knows that he has to incorporate some element of non-locality in his...

I'm building a clothing rack that swings out of the way. It's ideally made of 7/8" (or possibly 1") stainless steel tube, with 1/16" thickness and will sit on a 3" bearing (lazy susan) that supports 200lb. The top is firmly attached to a stud in the sloped ceiling. It needs to hold up something...

Hi, I am applying to American universities as an international undergrad from India. I don't know when to submit my affidavit for financial support. Should I submit it with my transcript or after admission in the University. I have this confusion because there is no information about such...

I sketched out a slightly simplified model. It is a cantilever rod with two supporting rods of slightly larger diameter, connected by a plate. (Ignore the weight of the individual parts. For illustration purposes, I draw this to resemble a cantilever beam from the side view but in actual design...

Homework Statement I'm asked to find the W and I was told that the rope at C is in tension , there is reaction at B , my question is , is there any reaction at C ? Homework EquationsThe Attempt at a Solution

Sorry for silly question, but have been wondering. Diving board it is bolted to the ground(base platform) (vertically), why not assume it as fix. the way bolt is secured is same direction as the load, hence it is not easy/resist to rotate up and down like pin or hinge. so there is moment. Isn't?

I was wondering if anyone knows a good PhD thesis writing support group, either online or in London? I couldn't find any and I wanted to set up a meet up group... but I'm not sure what we would actually do to support each other... and when I finish in a few months, what then? Also I'm afraid...

Homework Statement This is the diagram, and the question is written there too (sorry for blurry picture) Homework Equations My main question is that when you draw out the FBD, at point A, there is a force going up, and a force going to the right. Why isn't there a moment around A? I have had...

Hey guys, I am developing an program for calculation of reactions in a "4 point support beam". The problem is that this structure is Statically indeterminate and hence requires some other method. Support on any level is appreciated, especially from Civil Engineers. I will keep on posting...

Homework Statement why the reaction of pin is only acted towards the pin ( the horizontal of reaction of the force is directed to the left , whereas the the vertical component is acted upwards ) , why can't the horizontal of reaction of the force is directed to the right , whereas the the...

Homework Statement why the recation of the force is acted to the right ? why not to the left ? how to determine it ? Homework EquationsThe Attempt at a Solution

Homework Statement [/B] Determine support reactions. a=3 m b=2 m c=3 m F1=20 kN F2=30 kN F3=15 kN M1=30 kN*m M2=25 kN*m M3=25 KN*m q1=12 kN/m q2=24 kN/m Homework EquationsThe Attempt at a Solution

Homework Statement A 7.20m long rigid beam with a mass of 105.9kg is supported at each end. A 64.8kg student stands 1.33m from support 1. How much upward force does each support exert on the beam? (Enter your answer for support 1 first, followed by your answer for support 2.) Incorrect. Tries...

I am interested in the solutions of the Klein Gordon equation. Plane waves solutions are well known in physics. they look like ## e^ { i (kx - \sqrt{k^2 + m^2} t)}## or superpositions of them. They are finite when t or x go to infinity. I am looking for the general solution of the problem. In...

Homework Statement A) Draw a free body B) determine the tension in rope A and the reactions in B. Homework Equations [/B] Standard equilibrium equations The Attempt at a Solution My free body shows a collinear force T through the rope, the given downward force at 5ft, and then a Bx and By...

Homework Statement Let ##\left\{(x_1,x_2) \in \mathbb{R}^2: 0 \leq x_1 \leq 1 \; \text{and} \; 0 \leq x_2 \leq 1\right\}.## Find the support function ##\mu_s## for this set. Homework Equations We define the support function ##\mu_s: \mathbb{R}^n \rightarrow \mathbb{R} \cup...

Hello :) I was assigned a project yesterday and have been struggling with it trying to find my perfect measurements... I have to create a tower out of paper that would support a textbook My materials are paper and glue. My paper may be as long as I want but no wider than 1 inch, I currently have...