Load Definition and 1000 Threads

Homework Statement A beam of mild structual steel has a solid square cross section of 100 mm and is simply supported by two supports 3 m apart. Calculate the dead load that can safely be supported when applied to the middle of the beam? Homework Equations The Attempt at a Solution...

Card provided one half of an a4 size (105mm x294mm) The card is fashioned into a beam and will be subjected to a load test. Rules 1. The card may only be folded to form a beam; you can cut it to suit your needs. It must NOT be rolled into a tube. Not permitted to use Glue, Adhesive tape...

Hello, I am attempting a problem in an older statics textbook an image of which is attached. No matter what I try, I get a solution of between 0.52 and 0.53 metres and was hoping someone could verify if the textbook answer of 0.48m is right or wrong. Thanks Heaps, Scott.

HI Any help with this problem would be much appreciated. I am designing a system in which a cart type machine needs to be able to carry a load up a hill with almost no help from the person pushing, My question is how do I calculate how much power is needed by the motor to move the load...

Homework Statement This is one half of a load cell I am analysing for an asignment. I have managed to calculate the stress in the beam using the equations below. I have approximated the centroid to be along the red line so that I can work out the distance for M, and then taken y or...

I was positive this is a simple uni style question, but I can't seem to work it out. I have a pneumatic cylinder that has an allowable 10N of side load acting on the end of the piston rod, at an extension of 0.1m. Now Let's say the cylinder is generating a force of P=200N. And the load it is...

Homework Statement hi, iv just got a few questions and I am hoping someone can help me:) 1) so the relationship between load and deflection is liner but how can i explain it further? 2) and I am not sure about the relationship between deflection and span? 3) and what happens to bending...

Hi, I am currently studying for my Masters Degree in Mechanical Engineering at the University of Strathclyde (Glasgow, Scotland) and as part of my final project I have to design a 'rig' with which to conduct experiments on climbing belays. The problem I am having is in designing the 'rig'. I...

Hey everybody! I am currently doing a project whereby I have to build a test rig for a certain corrosion sensor. As part of this rig, I have to incorporate a real time weighing mechanism to determine the weight loss of the specimen during corrosion, and log it in a PC. Hence, I am...

I was wondering the critical load vary as a result of forced vibration? Intuitionally, I thought the critical load reduced. But how to show it analytically, Any idea?

Homework Statement Hi , I got a MI problem for a given application. I need the failure load of a beam in order to derive the Merit Index. Does anybody knows the equation of the failure load of a beam ?

Homework Statement When a 2-kΩ load is connected to the terminals A–B of the network in the figure, the current through the load is IL = 10 mA. If a 10-kΩ load is connected to the terminals, IL = 6 mA. Find IL if a 20-kΩ load is connected to the terminals. 2. The attempt at a solution I...

Homework Statement Calculate the load current and voltage at "X" when Rl = 1K and Rl = 10K

Homework Statement I was asked to calculate the value of the resistance/phase of the load in balanced 3-phase purely resistive load. it stated that there are two different ways to obtain the solution. Homework Equations W1 = VL IL cos (30-theta) W2 = VL IL cos (30+theta) where...

what is meant by dc equivalent circuit and dc load line analysis? why we require these two ? advanced thanks.

Homework Statement A metal rod having a diameter of 10 mm is subjected to a repeated tensile load. The material of the rod has a tensile strength of 290 MPa. How many load repetitions can be applied to this rod before it fails if the magnitude of the load is (a) 5 kN, and (b) 11 kN...

Let me start off by saying I am completely new to this so forgive the simplicity of the question, may training is in commodities trading not science electricity. I have a power source (three solar cells) that are putting off 3.23 amps at 1.755 volts with 20 gauge wire. These measurements are...

Hey guys, I have searched for information, but I'm looking for an explanation on the difference between a safety factor and a service factor for gearing, and how you would use the latter of the two in calculation (i.e. does it work like a safety factor?). Does anyone have any references that...

Homework Statement This seems to a reasonably basic question to go through but yet I seem to have a bit of a mental block on it. so any help in the right direction would be great.. An I-beam is 10mm thick on the web and flange, is 6m high and has a Young's modulus of 200 GN/m2. The design must...

Hi all. I'm hoping someone can help me out on a (for me) tricky little issue. We are to use a communication module that we know will draw 5amp and must be supplied via a UPS. Tricky bit is that its 3.5km away so we need to step up the voltage at source and step down again at load. 400Vac is to...

Question: A beam is givn with an axial strain of 500x10^-6 and a Young's modulus of 200GNm^-2. work out the magnitude of the tenslie load. Rlelvnt equations: σ = YM x Axial strain My workng: So far I have worked out the stress of the beam to be: 36000000Nm^2 36MNm^2 But from...

Hi guys.. just want to ask for the formula for the computation of the total load current in the schedule of load in order to size the breaker accurately. Hoping for response.. THANK YOU. :)

Howdy, I am a mechanical engineering student with limited circuitry knowledge to start... Anyhow I have a [-500,+500]lbf load cell that is essentially a wheatstone bridge strain gauge. I want to give it either 9Vdc or 12Vdc excitation voltage since I have a regulated power supply that can...

Hello, so here is my problem. Homework Statement I am given tensile data, which is displacement (mm) and load (kgf). also I am given width(mm), thickness(mm), gauge length (mm) and cross-head speed (mm/min). How do i make a stress strain curve from this? The Attempt at a Solution...

Registered my classes for the upcoming Fall 2010 semester; these classes are only courses I need in order to transfer to USF. I've already completed all other requirements except Chem I + Lab. Registered courses: (17 credit hours total) Calculus III - M/T/W/TH Physics II + Lab - T/TH...

I have a c shaped hook that I am trying to find the maximum load before it starts to bend. Is there an equation for this. I have the yield strength and dimensions.

Is there a way to deliver constant power to a varying load. Any ideas will be appreciated.

I am working on a spreadsheet for designing a small footing to support 1-4 Radiation Portal Monitors (RPMs). These are vehicle scanners weighing in around 2-2.5 kips a piece and roughly 7.5'Hx3'Wx1.5'D. they are arranged on the footing in a few different configurations. aside from the self...

{****not a homework question****} This question has a slightly different theme than the typical torque and inertia problem - I have to determine stress on a bolt. A steel block of mass M is bolted to the rim of a slowly rotating steel disc of radius R whose axis is horizontal; the rotating...

Here's my problem, I want to choose a motor to drive my load but I'm not sure about those choices as motor characteristics are given in torque. I want to know what is the MINIMUM Torque required to be able to rotate my load. I thought about T=rFsin(theta), but not sure how it would apply to my...

When calculating buckling force i have only found how to calculate it with a force applied to the entire cross section, how can you use Euler's if the force is applied just to an edge or point. Thanks

Hello, we are doing an activity at work to calculate what the shock load would be on a wire cable under the following conditions. There is some conjecture on how best to do this so we figured it would be best to ask some people with bigger brains than us ;) Hopefully the following info is...

I need some help in calculating the load rating for a multi-bar hinge. This hinge is different from a door hinge. It is fitted beneath the windows and can be used for either side-opening of the windows or for top-hung windows (windows for high-rise glazed glass buildings). The hinges are...

Homework Statement Explain if wind on walls and roofs of buildings is considered a pressure or a force? Homework Equations P = F/A The Attempt at a Solution Wind load should be measured in terms of pressure?..but I don't know the exact reason why it is. Does it have something...

3" x3" tube, 3/16' vs 1/8" thick load strength Hello, Any help would be appreciated. After calling umpteen places, and searches, I've found this site, which is a gold mine of info, and thanks for that. I am trying to figure out what the load strength of steel tubing, that is 3" x 3" 3/16"...

This should be a pretty simple but I am having trouble finding the right information. For a 6x6 wooden post for now well say 12' above the footing I need to determine the max load vertical load it can take before it fails. I live in Canada so was looking around Canadian lumber standards and...

Homework Statement A human bone has a youngs modulus of 10^10 N m^-2. It fractures when the compressive strain exceeds 1%. What is the maximum load that can be sustained by a bone of cross sectional area 3cm^2? Homework Equations? F= Y*(change in length/ original length)* cross...

hello, I am no electrical engineer by any means but I've taken up a interest in electronics and whatnot. Now that we have my novice status out of the way here is my problem. I have a GE Medical TEC water chiller, uses peltier junctions to cool or heat the water. It works via a PWM circuit of...

Hi everyone, I'm planning to major in chemistry double minoring in physics and math. Next year I'm registered for a full course load (5 courses) each comes with a lab 3 hours long (except one which is 2hrs). These are all second year courses and they cover material I've never heard of. The...

Homework Statement collector emitter voltage collector current VCE V IB=100μA IB=200μA IB=300μA 400μA 500μA 0 0 0 0 0 0 1 3 7...

http://www.harborfreight.com/1-2-half-ton-capacity-pickup-truck-crane-1647.html I bought this truck crane for my father. How could i calculate the force needed on the handle to lift a given load? I could measure it but I am interested in how the math is done. For simplicity i'll assume the...

Homework Statement A horizontal beam 8m long, resting on two supports 1.5m from each end (supports are 5m apart), carries a uniformly distributed load of 25kN/m between the supports, with concentrated loads of 20kN at the left end of the beam, 30kN at the right end, and 40kN in the centre...

I have a question regarding what material type and thickness could support a given load most cost effectively. Weight of the part will also be a factor in the cost due to the wacked out freight charges these days. I have no idea where to locate the information that I need or a formula so...

finding the collapse load "P" i am taking a course on solid mechanics, and we are learning plastic deformations in transverse loading, in this question i am asked to find an expression for the "collapse load P" as a function of its placement on the beam "x" i do not remember learning the...

Homework Statement How would you calculate the reaction / kick load of a cannon / mortar with a Projectile Mass "Mp", Max Pressure Output of initiator/gas generator "Pg", Stroke Length "Ls", and Surface Area of the projectile where force is applied "As"? Homework Equations The...

Homework Statement To find the reaction at A and B. (See image below) Homework Equations Moments and Area The Attempt at a Solution Area of load: (0.3)(6) = 1.8kN Moments about A: -(6)(0.15) + RB(0.6) = 0 --> RB = 1.5kN 4. The error and question I get the reaction force at...

My boss just told me to get him this today and the last time I took a mechanic class pluto was still a planet. See diagram attached. Both bulkhead A and arm are made of aluminum T6061 hollow tubes. Arm is at center of A. Assuming that arm will never break off from A, will the current...

1. A large power transformer has a turns ratio N1 / N2 of 1:5. When the primary voltage is 400v and it is connected to a resistive load its secondary current is 100A. Calculate the required value of source resistance of the supply to give a maximum power trnasfer 2. Vp = 400v, Ratio 1:5...

hey there.. how am i going to sketch a vector diagram of the given diagram? is it same like phasor diagram?

Homework Statement "for a cantilever beam with a concentrated load in the middle of the span, prove that the slope is WL2/8EI, and the deflection is 10WL3/96EI" Homework Equations the length of the span is L, the concentrated load is acting in the middle at L/2 The Attempt at a...