Load Definition and 1000 Threads

I am a 3rd year civil engineering student and this is the first time i come across this problem and i am struggling with it. My problem here is that i don't know how to draw a shear force and bending moment diagram for a trapezoidal load on a beam with fixed supports at both ends. I know...

Homework Statement I have a bumper and I am trying to determine whether or not the rectangular tubing I am using to build it is strong enough to withstand a given load (rear end collision). The horizontal member is 4x3x.1875 tubing (4" base, 3" high, 95" long). Two 3x3x.1975 tubes are used as...

I have modeled a curved surface to which I need to applied forces defined in a Excel csv sheet. I have successfully created an external data box in the project schematic and tried to import the load into mechanical. The load file I have resembles: X Y Load 0.3...

I am planning on building an above ground storm shelter that will be 16' x 16' by 8'. The footers will be 24" W by 12" D with 4-#4 rebar. Insulated Concrete Forms (ICFs) will be used for the walls then a 5" floor slab. Concrete space of the ICFs is 6.5" or 8" or 10" defending on someones...

Homework Statement Consider a mechanical car jack. To change a wheel it may need to lift a load of 2000N. Suppose that one rotation of the screw raises the car by 10mm. You apply a force to the end of the lever, 0.5m long, through a full circle. The jack is only 40% efficient. Calculate the...

After going through the chapter of Alternator (i.e Synchronous Generator) I have come to know that if the steam input to the turbine which is coupled to the rotor shaft of the alternator is increased the load angle will increase.. but what is the reason behind this ? I want to know both...

hi, this is not a question from Hw its pure interest. 1.lets say i have an electric motor with a shaft radius r lengh L, and at its end there is a metal disk with radius R and thickness b. if the motor supplies torque τ what would be the momentum on the disk? i was thinking that i the motor...

I could rephrase the same question, why does the frequency decrease when load exceeds generation? I know these are fundamental operating characteristics of a power system network but I'm not sure I can mathematically prove it. My best guess is that everything dissipates more power when the...

I want to build a crane to load my handicap scooter on my pickup. In my design I need a 36 inch beam, fastened at one end, free at the other. The beam will be loaded at the free end with 150 pounds of static weight, and it will also have a maximum moment of 500 foot-pounds tortion at the free...

Homework Statement The object is a crane arrangement of pipes that falls forward without any loads or counterweights on it. We can take it apart measure the weight and the length of the individual pieces.How much weight can a tower crane lift without tipping? I just need a general way to...

Homework Statement The following results were obtained when a spring was stretched: Load/N: 1.0 3.0 4.5 6.0 7.5 Length of spring/cm:12.0 15.5 19.0 22.0 25.0 A) use the results to plot a graph of length of spring against load. b) use the graph to find the: i)...

Hey everyone Homework Statement Im trying to calculate the force encountered by an object falling due to gravity that is caught by a rope. Obviously F=ma and since mass is constant I need to find the rate of deceleration. I've tried to using the equation v^2 = u^2 +2ax as v = 0 and u...

Homework Statement I understand power factor is defined as (average power)/(apparent power) or cos(theta v - theta i) where theta v = load voltage and theta i = load current. Also the power factor angle is equal to the load impedance. I don't understand how the 2 definitions of power...

I have a heater coil (purely resistive) of resistance say R. If I hook this resistance to the mains, I get power of V_source_rms ^2 / R. I don't want that much power. So, I use some power electronics switching device, and hence reduce the effective V_load_rms to a lower value. So, my new...

how to find power factor of the load, the three voltmeter readings are V1=220v,V2=122v,V3=136v

Homework Statement A bridge is idealized as a simply supported beam AB of length L, as shown in Figure 2. A four-wheeled vehicle of weightW now drives across the bridge. Sketch the shear force diagram for the case illustrated, where the rear wheel is a distance a from the left support...

Hi I am trying to work out the load applied to some anchors used to hold a car stationary in a man made river channel. I know it will be something to do with the surface area and the speed/volume of water. Can anyone help, admittedly I am a practical person not a acaedamic so layman terms...

Good day everyone. I have built a car port post in an inverted L shape and want to calculate the load that it can support. I think I have “over-killed” the posts enough. I am curious to see how much weight this structure could hold. Any way of calculating the load at the area which...

hello everyone, now i in practical in some company and they want me to design ladder and calculate the load that the ladder can support. the ladder is use to connected between barge and jetty. the ladder also has handrail as stiffness and it work in 45deg. dimension for ladder length...

Please help, i can't answer part B, but think i am using the right equation! Thanks A student is designing a suspension pull rod for a car. The rod consists of a central tube section that has a wall thickness of 1.0 mm. The following tube diameters are available: 10mm, 8 mm and 6 mm and the...

I may be doing it correctly, but the number seems way to small for the initial calculation. Plus I am really not sure how to factor in those other forces. Modulus of elasticity E = 114 GPa (if unclear) thanks ps. answer is 0.804 mm

Hi there! I have here a CAT Standby 650 ekW 813 kVA 60 Hz 1800 rpm 480 Volts generator with CAT 3412C TA Diesel Engine. Im trying to come up with maximum apm load which can be connected to this generator. What formula should I use for that? simple one W=V*A, where A=W/V good enought? Or...

Hello, i need information who know or advise where i can to find literature, how to caltucalate this. 1. I need information how to caltucalte load (snow, wind and other forces) which can keep this roof, and 2. how to choose dampers which keef roof. Maybe anyone know how to calculate this...

Hello, I have a real world sports question I need help with: I am looking for an accurate formula to calculate the load of Slackline equipment (will explain shortly), based on: - The length of the line - The sag of the line - The weight on the line Slacklining is like tight rope...

Homework Statement A system of two springs is considered, with spring constants k1 and k2, arranged in parallel and attached to a massless rigid bar. The bar remains horizontal when no force on it is zero. Determine the equivalent spring constant (ke) that relates the force applied a distance...

Homework Statement Several beams of 533 x 210 x 92 kg/m UB section in grade 5275 steel are used to support a composite floor slab. Each beam is simply supported with an effective span of L=6.50 m. (a) During construction, before the floor slab is cast, a temporary concentrated load P kN...

I'm making a rc cart with 4 wheels with rubber tracks on them. Two front wheels are powered by two dc motors 3.5-15[Nm] torque. Torque of 15[Nm] represent stalled torque. Let's say that friction between wheel axel and body of cart is minimal. Diamter of axle is 10[mm] and the diameter of wheel...

Hello, I've been toying with the idea of making a cheap dynomometer for small electric motors, but one of the obstacles I'm encountering is finding a cheap load cell. The best I've done so far is a $75 sensor from Omega, which still requires conditioning. Then it occurred to me that you can...

In the context of power systems, what does it mean for a load to be unbalanced? Or for that matter, balanced?

Please help with this query to find how much load a dumper truck can lift without it becoming unstable and toppling. Homework Statement A lorry has a volume of 42 cubic metres and can hold 78,000kg sand. The overall length of the vehicle is 9.5m with a pivot 1.2m from an end. The bed...

Hello all, I have a problem in ANSYS workbench. I have modeled a curved hollow cylinder and I have divided the top face(ring shaped) into various sections as shown in the attachment picture. I am applying surface loads on those sections/surfaces. Is there a way that I can make the load move...

Hi All I have some old programs that can only run on XP. It is impossible to buy a new XP laptop anymore. I am thinking about buying a new Windows 7 laptop and load the XP into it so it can run the old programs. What do I have to look out when buying a laptop and also When is the XP OS I should...

Dear all, I would like to know from you the solution about this problem (which is not a homework, but a topic of my Master thesis!): I need the strain energy density related to a circle of radius r0 centered in an arbitrary point of a square plate, under the boundary conditions described in...

I'm unsure what the purpose of this is. I have looked it up but can only find some explanations stating "role is to convert the differential current input signal to a single ended voltage signal without the intrinsic 50% losses and to increase extremely the gain." I'm not sure what double...

Hi all. This question has been bugging me for a while now so hopefully you can help. I want to know how an electrical load (such as a motor) maintains its power, like when the voltage drops the current increases. I know all the formulas ( in this case P = V x I ) but want to know how it...

I have a dc motor geared to a diaphragm pump, and all hardware are unchanged. As i increase the supplied voltage, rpm increases, but so does the current (torque). I thought rpm increase would lead to higher back emf, and thus lowers the current. So would the only reason for my increased...

Hi all. Do we have a boundary (for classification) as to when a load can be called a point load or a distributed load? Thanks.

hye guys... i need to do some design which need me to use S beam load cell as gravity sensor...anyone have ideas about my project?

Homework Statement 6. A person weighing 900 N is standing on snowshoes. Each snowshoe has an area of 2500 cm2. Find the pressure on the snow. a. 0.18 Pa b. 0.36 Pa c. 1800 Pa d. 3600 Pa Homework Equations P=F/A The Attempt at a Solution I tried doing F/(2*(A))...

This is not a homework question.. just share your thoughts please...

Hi, I am new here. I have some problems with the engine motor. What is the difference between starting torque (or locked up torque) and stall torque? What happen if motor torque = load torque? Will the mass move up with constant speed or stay stanionary? motor torque = stall torque = load...

Why does a crystal oscillator need load capacitors? Is it because there will be some capacitive load across the xtal pins?

Hi physics forum, I'm going to use a transformer to step down 240V AC mains to 24V AC. I remember my physics teacher telling me about matching the load between the power supply and the load. Do I have to worry about this in my case? Regards, Richard

Homework Statement This is not actually a homework problem but a design evaluation problem I have encountered. I am trying to solve for all the loads at the pins and have used WorkingModel to try and give me some quick answers. However, the solutions offered by the software do not make...

Homework Statement This is not actually a homework problem but a design evaluation problem I have encountered. I am trying to solve for all the loads at the pins and have used WorkingModel to try and give me some quick answers. However, the solutions offered by the software do not make...

A steel bar that is 16mm in diameter is resisting a force of 25kN. What is the normal axial stress in the bar(MPa) Since MPa = N sqmm would it be 25kn/(0.016m x 0.016m) Im more after the process on how to get the answer than the answer itself.

Homework Statement Solve power dissipated by RL Find a new values for RL that will receive maximum power solve for the maximum power that can be delivered Homework Equations Nodal analysis mesh analysis superpostion etc.. The Attempt at a Solution Hello guys, I've beein...

Greetings, I’m constructing a machine that involves a linear actuator powered by a 12vdc motor. My linear actuator has a foot that crushes an aluminum soda can until the motor’s torque maxes out and it stalls. The machine is intermittent duty at about 6 seconds of use every 3 minutes. My machine...

Hi all, I have a problem with a VSD at work that's been confusing. I am a field service engineer for an oil service company, my line of work is in electric submersible pumps (ESP). The ESP motor is a 3 phase induction motor. Power here is 380V 50 HZ.We were using a VSD for motor control. The...

Homework Statement This is the network. The problem states that a new resistor is put between A and B, in parallel with R4. I should find the ideal resistance for this load resistor and show that this is indeed the ideal resistance for maximum power output. Homework Equations...