# What is Support reactions: Definition and 22 Discussions

Life support refers to the treatments and techniques performed in an emergency in order to support life after the failure of one or more vital organs. Healthcare providers and emergency medical technicians are generally certified to perform basic and advanced life support procedures; however, basic life support is sometimes provided at the scene of an emergency by family members or bystanders before emergency services arrive. In the case of cardiac injuries, cardiopulmonary resuscitation is initiated by bystanders or family members 25% of the time. Basic life support techniques, such as performing CPR on a victim of cardiac arrest, can double or even triple that patient's chance of survival. Other types of basic life support include relief from choking (which can be done by using the Heimlich maneuver), staunching of bleeding by direct compression and elevation above the heart (and if necessary, pressure on arterial pressure points and the use of a manufactured or improvised tourniquet), first aid, and the use of an automated external defibrillator.
The purpose of basic life support (abbreviated BLS) is to save lives in a variety of different situations that require immediate attention. These situations can include, but are not limited to, cardiac arrest, stroke, drowning, choking, accidental injuries, violence, severe allergic reactions, burns, hypothermia, birth complications, drug addiction, and alcohol intoxication. The most common emergency that requires BLS is cerebral hypoxia, a shortage of oxygen to the brain due to heart or respiratory failure. A victim of cerebral hypoxia may die within 8–10 minutes without basic life support procedures. BLS is the lowest level of emergency care, followed by advanced life support and critical care.

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1. ### Solving the Weight Puzzle: Explaining Why and How

My solution is However can someone explain in detail why will be equal to the weight? and why does it have to be multiplied by 6?
2. ### Engineering Find the support reactions on a beam

Hello! in this good afternoon ;). I need some help for this beam and his support reactions. The problem it is done, but my result its different from the teacher`s result. I'm sure my answer is correct, as even the "SkyCivbeam" online software also gives the same results. it appears that the...
3. ### How Do You Calculate the Safe Work Load of a T Beam?

Hi Guys, I want to determine the safe work load (SWL) capacity of a trestle in my workshop. It is a T Beam with width (W), height (h), thickness (t) and length (L). It is welded each end to two legs - what kind of support would this be considered as? Fixed or pin? Can someone walk me through...
4. ### Support reactions of a rigid, rectangular steel frame

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...
5. ### Balancing Support Reactions: Exploring Equilibrium in Structural Analysis

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 =...
6. ### How Do You Calculate Support Reactions in Beam Structures?

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
7. ### Does Angling a pin support on a truss change anything?

Homework Statement If you had a simple 2D truss with a pin and a roller support, would making the pin on a 30 degree incline change the supporting reactions? Homework EquationsThe Attempt at a Solution Can't see why since it still supports a horizontal and vertical, don't know hwy the angle...
8. ### Internal Force Diagram for Rigid Body and Distributed Load

I'm working on a homework problem for Statics and I'm stuck. Could someone please help?Problem: Draw the internal force (N,V,M) diagrams and include all significant figures Here is all of my work: Resulting F from W1: W(x) = W1 ∴ F2=∫02b W1dx eq (1) ⇒ F2 = W1⋅2b x1 = (F1)-1 ∫02b W1dx =...
9. ### Finding support reactions for shear and moment diagrams

Draw the shear and moment diagrams for the beam in the figure. Clearly show all values, including the maximum shear and maximum moment and their positions on the diagrams. Assume the supports at A and C are rollers and D is a pin support. note there is a hinge at point B. I am having trouble...
10. ### Support Reactions: Identifying Moments & Forces

I have trouble identifying what moments and forces are due to a support http://postimg.org/image/a2xux5qjx/ Can someone explain the moments and forces (and their directions) due to the support in this picture? http://postimg.org/image/kto0b0ft3/ Why isn't there a MAx and Ax due to the...
11. ### Support Reactions: Forces at A & D

Homework Statement http://postimg.org/image/60w1pznz9/ Are the forces at A the same for members ADE and member ABC? Likewise, are the forces at D the same for members FDB and ADE?
12. ### How to find support reactions in frames

how to find support reactions in frames
13. ### Calculating support reactions in a beam

Homework Statement Trying to calculate the support reactions here. Homework Equations ƩFy = 0 ƩMA = 0The Attempt at a Solution Well I've come up with the first equation (I assume two are needed to solve for both support reactions from the above equations). ƩFy = 0 RA + RB (up) = 10kN +...
14. ### Calculate the Support Reactions at A and B as a Result of the Force

Homework Statement The load per foot of beam length varies as shown. For x = 17 ft, the unit load is 373 lb/ft. At x = 0, the load is increasing at the rate of 41 lb/ft per foot. Calculate the support reactions at A and B. The reactions are positive if upward, negative if downward. I have...
15. ### The Method of Joints (support reactions)

So, I have a question regarding the method of joints used to solve force members in a truss. I am just starting the question and I am stuck on determining the moment in the support reactions. So my questions are: (1) For the moment around support reaction E do I include Force Dx in my...
16. ### Determining the support reactions of a frame

Here is a link to the problem: http://img62.imageshack.us/img62/374/frameow.jpg" I am trying to find the support reactions at A and B. I separated the frame at the hinge(call it C) into two parts and took the moment equation about point A. This gave me: \SigmaMa = -60(25) - 62.5(12.5) +...
17. ### Center of mass to find support reactions at pins for a homogeneous flat plate

Homework Statement The mass of the homogeneous flat plate is 50 kg. Determine the reactions at the supports A and B. I've attached the diagram. The Attempt at a Solution I know I will need to find the center of mass. I don't remember exactly how to do it, but I found the centroid...
18. ### Statics question: when do I need to find the support reactions?

I didn't use the format because my question is more general. I want to be able to understand the logic so I can apply it where appropriate. We're finding forces (and whether they're in tension or compression) using the Method of Joints and Method of Sections. I don't understand why...
19. ### Support reactions, castigliano's second.

Homework Statement Determine the support reactions for the given structure(see attachment) due to flexural deformations using castigliano's second theorem. Axial deformations are considered negilible. Homework Equations delta = dU / dP The Attempt at a Solution See attachment. I could use...
20. ### Determining the Support Reactions acting on a frame

Homework Statement Determine the SUPPORT REACTIONS acting on the frame http://i34.tinypic.com/j94hoo.jpg" You can see I have drawn the FBD, but I am lost on applying static equilibrium about point "F" because I don't know the distance from point "F" to any other point. In order for me to...
21. ### Determining the support reactions on a frame

Homework Statement Determine the SUPPORT REACTIONS acting on the frame (See Picture Below) You can see I have drawn the FBD, but I am lost on applying static equilibrium about point "F" because I don't know the distance from point "F" to any other point. In order for me to sum the moment...
22. ### Statics Help: How to Find Support Reactions for Structural Problems

Please click on the image to make it larger. http://img177.imageshack.us/img177/2355/staticsqn5.th.jpg I understand the problem here, what I don't see is how to find the support reactions. Since at each joint we have more than two unknowns I have to find the support reactions. I have the...