Questions tagged [statics]

Statics is branch of engineering concerned with the analysis of forces and moments on physical systems in static equilibrium.

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How do I find the vertical reaction forces?

The horizontal Force $A_x$ is easy but how did they get the vertical forces $A_y$ & $B_y$? I tried using similar triangles for the Force and length of the sides, somehow I can't manage to solve it....
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Plane Truss- Missing Member

Hello, so I'm looking for some help with part (a) of the question below. I've never seen an example like it before and I'm not sure where to start. How do I work would which is the missing member for ...
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37 views

Need help in deriving components of forces when they depend on lengths and angles. (2 questions)

I am having difficulty with two questions from a book I am studying about statics. I have seen the answers but it did not help me understand how the answers are derived. I want some advice on how to ...
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31 views

Simple Fulcrum Analysis

Something simple is tripping me up in a design, and the problem can be reduced to a simple 'seesaw' setup: a rigid beam with pin joint and a weight hanging from each end. I have attached an image with ...
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Statics poblem with a pre-stretched spring

I am dealing with a statics problem in the following link. This question is from the courtesy of Engineering mechanics, Statics by R.C. Hibbeler, 13th edition. Before applying vertical forces F and -...
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58 views

Analysis of Machine Frames With Cut Outs

I have a structure that is used to support two shafts which are carrying relatively high loads. It is composed of two columns and a "shaft supporting block" in the centre (almost acting as a beam). ...
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37 views

Parallel Axis Theorem for x and y Shift

I have a quick question about the parallel axis theorem. Let's say I have a box-like object rotated about the following pivot point I was wondering, by applying the parallel axis theorem, would the ...
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63 views

Where is the axis of bending for a box lifted by a crane?

A box is being lifted by a crane. Sometimes the box will be completely full, and sometimes it will only be partially full (indicated by the gray shaded regions). The question is, where is the axis of ...
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46 views

Extendable apparatus

Is there a kind of "handbook" for general engineering ideas and possible applications? I vaguely remember a machinist friend mentioning some standard book to glean ideas from... I'm in need of an ...
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43 views

In static equilibrium body, how can an applied moment about an axis contribute to reaction moment to another point away from the axis?

Determine the resultant internal loadings acting on the cross section at B of the pipe shown in Fig. 1–7a. End A is subjected to a vertical force of 50 N, a horizontal force of 30 N, and a couple ...
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How do you determine the Maximum Radial Load in Linear Actuators

should the maximum radial load be considered? A linear motor has a Maximum Load of 500N and a 300mm Stroke Length. There will be instances that the Linear Actuator will have a Vertical Force while ...
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38 views

Is there a moment at a point between two connected sliders, when one is subjected to a force? (schematic shown)

Background: I'm designing a machine that uses an actuator to push an object. The connecting component may not take certain bending forces, therefore I'm trying to evaluate the system with a free body ...
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76 views

Reaction Forces on a Beam

I'm new to beams and I'm struggling to find the correct vertical reactions forces at support C and E. The correct answer is 8.58 kN for $V_c$ and -3.58 kN for $V_e$ However, when I ...
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Help with finding support reactions of a truss

Can you please help me find the answer to the above question, I am unsure how to work with F2 as I can't find the distance from Moment A or Moment J to this. Thank you
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Derive a Transfer Function from first principles (PID, system identification, statics)

I want to derive a transfer function of my system so I can plug it into MATLAB and use the PID tuner tool. My system is a balancing beam with a motor on each end of the beam. My first principles ...
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Can you assume that the forces in the vertical direction are evenly distributed for an off level rigging problem?

This is an off-level rigging problem. When solving for the tension forces in the red slings (lifting from point A), can the assumption be made that the y force vector at points B and C are each half ...
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91 views

Dynamic spring tension [closed]

I have rope on a spool that is on a cart that is powered and moving at a constant velocity of 0.5 m/s. The end of the rope is passed thru a break and fixed to the wall. one break has a compression ...
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177 views

Simple beam deflection of cantilever beam

Recently I had need to prove the beam deflection equation for a simple cantilever beam with a point load at the end. The equation would be in reference to the Euler-Bernoulli theory taught in most ...
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Physical meaning of increment in static problem in abaqus

When we use Abaqus to solve the static problem, one step is to set: Time period, the number of increments and increments size. But since the static problem is not time-dependent, there is no time, ...
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Statics Distributed load question

Determine: the distributed load $w_0$ at the end of D of the beam for which the reaction at B is zero the corresponding reaction at C. Please show me how to get the right answer to this question.: ...
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62 views

why the constants of the shear and bending are zero

In order to get the bending and the shear function using the singularity functions we integrate loading. could you please tell me why the two constants are zero. We know that the load is related by ...
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54 views

Fluid Mechanic Buoyancy problem. How to determine the height?

I tried to solve it but I don't know how to bring the Area A in this equation. I used the area of the small vessel, but this one shouldn't be in the equation. Thanks a lot
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155 views

The internal normal force, shear force and moment

How do I determine the internal normal force, shear force and moment at the point C? $V_c = 0$, $N_c = 0$ and $M_c=3.75 kN/m$ I have already done this: Where is the problem?
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94 views

Indeterminate beam with a guide at each end

I've been battling with a statics question (as attached) and can't for the life of me figure it out. I've attempted removing the left side guide joint so then there are only 3 reactions and it should ...
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51 views

defining the dimensions of a bucket elevator chain link

how to define the shape of a heavy duty chain link when the pitch of the chain and the traction load that the chain is subjected to is known? lets say i consider the traction load as the maximum load ...
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52 views

Can a simple application of two forces have two different outcomes on a rigid body?

[Summary: If two forces are such that the component of one of these forces forms a couple with the other, than which of the two cases (obtaining resultant via adding forces or obtaining moment and a ...
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60 views

Centroid and toppling [closed]

A uniform block is in the form of a square ABCD of sides 2 m and a unit thickness. E is a point on AD such that ED = xm. The portion EDC is then removed from the block. What is the maximum value of x ...
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83 views

Calculate bearing forces

can someone tell me how to calculate the bearing forces of the two bearings? I can't get any further because I don't have the angle for the second bearing. I don't have an idea anymore. F = 20KN q0=...
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HELP WITH ASSIGNMENT. CENTER OF GRAVITY

I have a Statics assignment which I don't seem to fully understand. Here is the full assignment: For the first question I have tried making several tables with Areas of each parts and the centre of ...
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1answer
18 views

Supporting flexible square plate of uniform density in equilibrium with only 4 rolling contacts placed along the square's diagonals

Consider a flexible square of uniform density with vertices (0,0), (0,1), (1,0), (1,1). I need the 4 coordinates for rolling contacts along the diagonals that will stably support it. Someone could ...
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What is the difference in CFM, at a given static pressure, between a CPU fan and a Squirrel Cage Blower fan when moving air through ductwork?

I have a Delta ASB0912L DC Brushless fan. PDF here. In the datasheet it says, RPM 3800 CFM 67.80 IN H2O 0.302 On the blower, squirrel cage fan, Dayton from ...
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94 views

Inertia relief in ANSYS - rotating model

I'm trying to use ANSYS to solve statically a dynamic problem. As shown in the image below, there is an orange bar that is constraint to slide horizontally only and attached to another bar (pink) ...
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200 views

Statics Question

I have shared the question statement, its diagram and my solution but my solution is wrong and I have no idea why is it wrong, please help me out.
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statics exam question about friction

In a statics exam I had the question in the picture attacehd and I had some trouble understanding it. The question is so Under the effect of torque Mo rotates a wheel (radius r) with constant ...
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108 views

I'm taking statics, and I'm stuck on this truss problem, how do do I solve this?

I'm an engineering student, our professor assigned us this truss problem I found $A_y$ and $L_y$ by using the moment about l, and found ab, now what? It seems like I have too many unknowns to solve ...
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122 views

Statics problem ignoring horizontal reactions seems to require horizontal forces

I'm an industrial engineering student taking engineering mechanics, and I'm quite confused by this problem our proffessor gave us, the chair is supposely in equilibrium, yet in order to counter the ...
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59 views

Which container orientation, if any, can hold more weight?

These are cross sections of identical shipping containers, except one is rotated 45 degrees. The cross sections are squares, 3 meters to a side. I drew dashed lines to show where they're suspended by ...
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63 views

Statics problem: Finding resultant force angle measured counterclockwise from positive x-axis

I have this diagram: And I have done these calculations: $$\begin{align} R_x&=-20\sin(30)+30\cos(35)+80\cos(45)=71.14\text{ lb} \\ R_y&=20\cos(30)+30\sin(35)-80\sin(45)=-22.04\text{ lb} \end{...
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57 views

Stress analysis for the same configuration but different material

The same geometry and the same free body diagram. However, if we replace the material from steel to glass, for example. How does that influence the analysis? Two things I think are 1. steel is ...
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126 views

Can a propeller be used as a balancer by spinning it perpendicular to ground?

This is a unique idea of mine. In the above image, the torque reaction propeller is rotating clockwise producing a side-thrust of 40N. With its reaction torque alone, it has to balance the moment ...
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Estimating planar mass distribution

I have a planar object whose center of mass is not at the geometric centroid, and I want to roughly estimate the magnitude of four hypothetical point masses that at the four corners that would result ...
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1answer
268 views

Bending equation and max deflection of UDL and multiple point loads

I have a beam, simply supported with 2 points loads and 2 UDLs. The loads are symmetric about the centre of the beam. I've tried to derive an expression for the moment along the beam and then via 2 ...
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112 views

Solar Array Frame Design / Statics Design Problem

I need some help with a statics design problem. I am tasked with designing a solar panel frame to mount on a building and am the only engineer on staff so I don't have anyone else to ask the simple ...
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89 views

Calculating force exerted on plate by link

I am currently involved with a project using a mechanism similar to that seen in 'table tilters' and we are struggling to work out how to begin resolving the forces. The image shows the state we are ...
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1answer
717 views

Linear actuator on a scissor lifting table

I am designing a scissor lifting table and I have an issue with the linear actuator. This table should be lifting 100 kg. I studied the problem in two ways : a static study and a power study. My ...
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195 views

Timoshenko Beam Theory for Quasistatic Cantilever Beam: Shear Term

I'm trying to determine the effect of shearing force on the deflection of a quasistatic cantilever beam. In his book, Theory of Elasticity, Timoshenko added the following term to the deflection: $$\...
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402 views

Do flexible water hose cause pressure drop with constant flow?

My dad has a tub by a lake. He has a water pump in the lake to pump up water into a tub. He claims that if he use a flexible hose, the pressure in the hose at the top will be lower than if he use a ...
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Determining the load on a pump vibration isolator

It seems to me that pump vibration isolators need to support: The weight of the pump The weight of the water in the pump The weight of the water (only) in the drop to the pump The supplier of ...
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1k views

How would I find the Second Moment of Area of a Parallelogram?

How would I find the second moment of area of a parallelogram, as shown?
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240 views

What is the distance at which the triangular UDL is acting on in this problem?

I'm working on the statics problem below: I'm tasked to draw the shear and bending moment diagram for the frame. I'm trying to work out the reactions and I'm taking the moment about pin E.Here's my ...