Load Definition and 1000 Threads

Hello all I have a doubt with the load concept acting on a beam. Consider a robot arm, actuated using Electric motor. When the arm is static and hold in position by the motor, Does the Gear ratio reduce the load acting on the motor due to the Gear ? Or when the arm is static, the Gear system...

I want to understand what happens to the energy inputted into a simple machine if there is no resistance or load. For example, let's say you have a U-shaped tube of water with greater surface area on the left side. If a piston applies pressure to the left side and there is no piston on the right...

Any one can help with the following, i need to know the weight and radius of flywheel that will simulated a load of .104 slug-feet squared, calculation base in friction

Homework Statement I am asked to find the load in AD, BD, and DC... I have AD(2/surd38) +BD(2/surd29)=800 AD(3/surd38)=DC I can only formed two equation... But , so many unknown... How to solve this? Homework EquationsThe Attempt at a Solution

Homework Statement i am asked to find the reaction at A and B ... Here's my working : 15(3/2) +15(5) +15(6)+5(6/2)=RA +RB moment about A = 15(3/2)(3x2/3) + (15)(5)(8) + (5x6/2)(8+4) + (15)(6)(14) -RB(14) = 0 so , i have my RB=148.9N , RA= 53.5N , which is wrong ? which part of my working is...

I'm a sophomore Physics major, and I'm considering double majoring in Physics/Math. So I've looked over the classes I need to take, and next semester requires me to take Modern Physics, Differential Equations, and Applied Probability-Statistics. To be honest, I don't know much about what Modern...

I am trying to determine the capacity of this shelf i am building out of 2x2x.25 steel tubing. My only real question as of now, is let's say its 4ft wide and 8ft long, if i put a support every 1ft, does that mean when determining the max capacity i could treat it as several sections? guess what...

I am having the hardest time calculating q, the load per unit length. This question is in relation to my previous question I posted here. I have a cylinder laying horizontally that is fixed on its ends. The cylinder is filled with water. To calculate the deflection I am simplifying the problem...

I have seen an excel sheet in calculator to calculate the size of transformer. There are option to put the vales of Kw,PF,Qty and Equipment D.F. I could not understand what is D.F. What is the equation to calculate the D.F and equation to calculate the total load D.F?

A motor driven alternator connected to local load (in lab), say a lamp bank, slows down due to power consumption by the load I.e. nonzero power angle δ. But should it slow down when δ is zero i.e. with purely reactive load(like in SC test and ZPF test)?

Hi All, Is there a list of thermodynamics equations regarding the chiller process from condenser, evaporator, compressor to the regulator. Say I have chiller load at 90%, what set of equations could I use to determine the supply temperature of chill water and condenser supply temperature to...

Homework Statement [/B] What is the maximum full-load primary current that you could safely design for a three phase 500 kVA transformer bank to provide if it has a high-voltage winding of 25GndY/14.4 kV? What does the notation 25GNDY/14.4kV really mean? Is it 25kV three phase and 14.4kV...

Hi, I'm doing a project and an looking at building a small weigh scale and measure about 40lbs max (even lesser is ok as I'm learning). I'm looking for load cell thickness of 5mm or less (:smile:). I've one kitchen scale that I opened but that load cell is bigger. I looked at the web and found...

Please help how Ve is calculated what i think is that it should be: -Ve=-Vee+IeRe; How Ve is taken positive please someone draw equivalent circuit for same

We are applying a force with a machine that has a dial that measures lbs. P=F/A We have 5 blocks with a combined area of 20 in^2 and we want to apply a pressure of 35 PSI to them. Therefore F(total) for the entire Area is ~700 lbs. This is what the machine reads. If we put the load cell on...

Hello friends, I am doing my collage project in which main concept is to produce electricity from speed backer and want to use this energy for street light. now my que is my total load will be max 0.7 KW and i have no more idea about generator selection so can you please suggest the generator...

Hi all, Assume a standalone synchronous generator feeding power to a single induction machine which is made to run as induction generator at super-synchronous speed without any external electrical load connected to the machine busbars. What will be the behavior of the induction machine under...

Hi, I have just got into the battery industry and i would like to understand a few things especially when it comes to sizing a battery. For example: if i have a load of 1600W and the system voltage is -48V DC (for a telecom application). The main supply is AC which is converted into DC through...

I am creating a horizontal zip line, in which a rider will be pulled with a rocket engine. Completely serious. One end of the wire will be secured to a tractor and the other to a large tree. The zip line will be made from 12.5 gauge (2 mm) galvanized class 3 200 KPSI minimum tensile strength...

Homework Statement A 100 kN load is applied to a flange positioned midway (at B) along a 50 mm diameter steel bar (ABC). The bar is placed between two rigid supports and is thus constrained. Determine the position of the flange (distance from the left support) if the temperature of the bar...

Homework Statement Homework Equations FBD and all forces and moments = 0 The Attempt at a Solution Sketched in the image. So, I don't know how to go on with my analysis of the load, since I can't determine the reaction forces. Can someone please help me? Thanks in advance!

Homework Statement I just don't understand how to set the problem for the free body diagram (point (a) and (b)). Can someone help me with this problem? Thank you in advance.

Recently when i checked the electricity bill ,i found that the connected load was 200 Watts. How come it be when i use my 450W computer, 1000W iron box etc. Even the light bulbs and fan add upto more than 200W. Please comment. Thanks...

I'm currently a high school student. For background, I finished Calc BC soph year and I've taken Calc III, DE, PDE, Lin. Alg, and an intro to proofs course this past year at a local 4 year university (earned A's in all). I'll be a senior next year taking Real Analysis, Intro to Geometry, and...

Hello I am going to be a Sophomore in the upcoming fall semester. For the past couple of days I have been trying to decide if I should take another math class next semester. I am passionate about both math and physics so the lack of humanities does not bother me and honestly I am happier in the...

Is anyone interested in telling me the force created from 2 propeller blades rotating 2000 rpm.The total diameter of the prop is 72 inches and the weight of 1 blade is 4 lbs. Reason for the question is I want to mill a clark-y profile the length of the blade less ,4 inches for a bolted...

i have made a beam with both ends fixed. when I apply load at center then the ultimate load will be 8Mp/L=8fyz/L which came to be 440KN My question is how to calculate the load at which beam starts yielding? I have used E=200000N/mm2 and initial yield strength=220N/mm2

Homework Statement A 270-kg load is lifted 21.0 m vertically with an acceleration a=0.150 g by a single cable. A)Determine the tension in the cable. B)Determine the net work done on the load. C)Determine the work done by gravity on the load. D)Determine the final speed of the load assuming...

Can you please help me out to find out the load that a Hollow pipe can withstand. OD-320mm ID-310 mm Height-600 mm Material -Mild Steel How much load can it withstand? Your help will be appreciated.

Hi, I've been trying to solve a problem which i don't even know how to approach. I have a vertical hanging cylindrical beam (free to swing sideways but not around itself), the beam is subjected to an eccentric load, downwards, at the bottom of it. The load is parallel to the swinging plane (it...

Homework Statement What would be the effect on the following if the load torque is increased and the speed maintains constant: a) the tension in the tight side of the belt b) the tension in the slack side of the belt c) the power transmitted Homework EquationsThe Attempt at a Solution I...

I need to be able to support a variable side load up to a maximum of about 250lbs at 10' high. I am planning on using a 14' 4x4 steel pole that will be anchored 4ft in the ground (with concrete). Question I have will 4x4 square pole be good for this application, and would 1/4" thickness...

Homework Statement http://www.upload.ee/image/4762203/DSC_0009_1_.JPG I need to find the formula which is in the red circle. Beam is simply supported at both ends and there is center load. Do you think that this is correct? Homework EquationsThe Attempt at a Solution

a load moves horizontally across a flat bridge, eg a train, does the time the load is on the bridge affect the vertical force on the bridge. put another way; can a bridge support a load greater than it's maximum load it can support for a stationary object if the load is only on the bridge for a...

http://www.upload.ee/image/4760492/DSC_0002.JPG Homework Statement I have given angle of twist, diameter, uniform load, and length of the beam. I need to find the G.The load gives me some trouble and i don't know if i should solve it by using integration or? :) Homework EquationsThe Attempt...

First time poster. Looking for a clip that will release under a load of ~250lbs. Been looking at shear pins and torsion springs but wondering if something already exists. It will be used between two ropes and will release automatically once load is hit. Something adjustable from 200lbs. to...

The title of the project is as follows: A study of the effect of imperfections on the buckling capability of a soda can under axial loading. My group and I are aiming to carry out the following: Linear buckling analysis of soda can to gain first 5 eigenvalues Riks buckling analysis with...

Two trucks with the same futures,one loaded and one empty. They are traveling on same speed and when they brake on the same spot;which one stops earlier? Does a truck's load affect it's braking distance? Thanks..

Homework Statement I have a step down transformer (6 : 1) Copper Loss of 110W at full Load Primary Coil: I = 3.33A R = 0.35 Ohms Power Loss = 4W Secondary Coil: I = 20A R = 0.265 Power Loss = 106W Power Drawn Over the Primary = 75W 9kVA Transformer Homework Equations The Equations i have...

Homework Statement Calculate the horizontal force P required to raise the 100-kg load. The coefficient of friction between the rope and fixed bars is 0.40. Homework Equations T1/T2 = e^(βμ) Where β = the angle of the rope on the log, μ = 0.40, T1 = the bigger tension (P), and T2 = the...

Hello all, I am currently in undergrad and am planning on taking 18 hours next semester (4 maths and 2 physics courses). I was just wondering if anyone who has taken these courses could tell me if the course load would be too much. The courses are: Linear Algebra, Differential Equations...

Hi there, I would like to hear your opinion on taking 15 credits vs 12 credits. All the classes are engineering classes worth 3 credits hours. The list goes as follow: INTRO TO ENGINEERING DESIGN (Lecture) INTRO TO ENGINEERING DESIGN (Laboratory) SOLID MECHANICS (Lecture) NUMERICAL...

If load voltage vary..will Vce_Q1 changes in opposite direction in order to compensate change in Vce_Q2 in order to eliminate early effect in Q2...??

Homework Statement find internal normal, shear, and moment forces at point C, P=8kn The Attempt at a Solution for the most part I can solve this entire question but looking at the solution for it one of my equations is different and I cannot figure out why. my equation for finding T(tension...

Homework Statement Plot the iA vs. vA characteristics for the nonlinear network shown in Figure 4.49. Assume the diode is ideal. The nonlinear network from part (a) is connected as shown in Figure 4.50. Draw the load line on your v i characteristics from part (a), and find iT Homework...

I am using the following formula to determine the lb load against the bottom of a load cell from tightening the bottom anchor bolt nut (which anchor bolt goes through the center of the load cell structure and anchors to a bottom base plate) to a certain torque force, plus adding a live static...

Homework Statement A cargo packed for aerial dropping can withstand an impact speed of 20 mph. A 100 foot diameter circular parachute is used for a particular load. What is the largest load (including the chute itself) that can be accommodated by this chute. [/B] Homework Equations Vt =...

In an induction motor problem , I need to find the full load current & torque..for that I calculated the impedance with given data..& I got the impedance in polar form..But in the solution for finding the full load current they put only the magnitude of the impedance & not the phase..! I didn't...

Homework Statement http://tinypic.com/r/24mua0h/8 Homework Equations I've done all parts except question 3, which I'm not sure. is it because the fulcrum is providing an upward force to keep the load in the air? The Attempt at a Solution

Homework Statement The attachment depicts an active load (to the right is the equivalent circuit). It is called thus because this load (measured from TP27) changes its resistance according to the controlling signal connected to TP25. The load is switched “on” (minimum resistance) and “off”...