Mechanical Definition and 1000 Threads

Hello I am a senior in High School and I'm wanting to become a mechanical engineer but I have an issue I'm wondering how much of a disadvantage I would have for not taking Physics or Precalc in High school. I am now studying them up by myself even though I can't take them in High-school.

Hi guys and girls this my first post! Hope i got it in the right place. I need help understanding the mechanical advantage of this mechanism. The top sprocket is the input power the bottom sprocket is an idler the attachment on the chain is the output. Help!

Hi If anyone has job prospect info, statistics or anything about these, please tell. Thanks a lot Energy and Fluid Systems Manufacturing and Dynamic Systems Materials Engineering

Homework Statement Two Hermitian operators X and Y have a complete set of mutual eigenkets. Show that [X,Y]=0 and interpret this physically. Homework Equations [X,Y]=XY-YX If [X,Y]=0, XY=YX The Attempt at a Solution I have proved that [X,Y]=0, but I'm just falling a little short of...

So I am awere of everything in electromagnetism in physics,but lately I am enjoying in creating RC cars.But I only got to making a car going only forward,how can i make him turn?How could I transform only a part of the electrical energy into mechanical so that my RC car can turn left and right...

The problem: Rumford observed that when one horse turned a cannon bore for about 2.5 hr the temperature of 27 lb of water that was initially ice cold (i.e., near 0°C) rose to near boiling hot (i.e., near 100°C). Given that one horsepower is 33,000 ft-lb;min, that 1 kg weighs 2.2 lb, and that 1...

When one lifts a block off of the ground and holds it in the air, the work done by one's lifting force is equal to the change in total mechanical energy of the block/earth system. Since the mechanical energy is KE+PE and since KE doesn't change during the motion, the work done by the lifting...

[FONT=Book Antiqua]Well, [FONT=Book Antiqua] here it goes again, I am a senior in high school and my english teacher has assigned my class a research paper with the topic being a job that we are interested in. My last post got deleted due to this sites rules, so does anyone know where I can...

Hey guys. So here's my story (and I'm sticking to it! - current career joke). Back in high school I had thought that a career working on cars was my dream job. I went to Lincoln College of Technology at 17 and when I realized how big of a waste of money it was I left (with a 3.8). Moved around a...

Hey there, i need some help please :) As an assignment from my course, they asked us to bring some mechanical solutions for electric problems, and I don't mean in a specific area, i mean generally... i looked over the internet for it and found nothing.. If someone can please help with that would...

Homework Statement A student holds a book at rest on the palm of her hand. She lifts the book straight up, bringing it to rest again at a higher point. 1. Is the net work done on the book positive, negative, or zero? 2. Is the change in the gravitational potential energy positive, negative...

Hello, I am in college for mechanical engineering right now and was wondering how it is in the future when i get an engineering job, any insights or suggestions for the field? im wondering how it is on a day to day basis Thanks

Hi, I would like to establish a advancing/learning way to learn and understand machine elements. Today I tried to search for hydrodynamic radial sliding bearings on search engines but I have find only two results. Is something wrong for it? it should have another names...

Hi everyone, I am new to the forum, so please let me know if I have made any mistakes in my posting location. As mentioned in the title, I am returning to school for a second undergrad degree. My first degree was in Business Administration - which did not satisfy my academic needs (to say the...

Hello Everyone, This post is with regards to queries for which I am still struggling to find answer. I am really confused about what to do in future. My question is how to do a MSc in Physics or Nuclear Physics after completing B.Tech? I will be explaining my situation below and I will try...

Alright, the problem at a glance is rather simple: find the mechanical advantage at two given values of θ2. Given: rO2A = r2 r02C = rin rAB = r3 rO4B = r4 rO4D = rout rO2O4 = r1 θ1 = 135° Find: Mechanical advantage when θ2 is equal to 104°, and when θ2 is equal to 91°. Equations to use: Mech...

When a 90kg man stands on a snow-covered trail, he sinks a certain amount into the snow-covered trail, he sinks a certain amount into the snow because the compressive stress between his boots and the snow is larger than the snow can support without crumbling. Assuming typical cross-country skis...

Hello fellow PF members, I'm currently in my senior year in Mechanical Engineering at Oregon State University. I'm considering going on to get my Master's Degree to gain more knowledge (since I'm fascinating by them). I really like Math and have a Math Minor already. I am looking to go into a...

Hi! I am now doing my first semester for an integrated master's degree in mechanical engineering at a Norwegian university. I am doing well, but I have been second-guessing my choice for a while now. I have to admit I really was uncertain about what to chose, and while I mainly considered...

When do one use the principle of conservation of mechanical energy to find the velocity of a mass, and when would you use the sum of forces equals to the mass times acceleration, and there after use a ds=v dv in order to find the velocity. The specific question related to this is a spring fixed...

Hello experts, Is it possible to run several instances of Ansys Mechanical in Windows or Linux in parallel? How? I need to dramatically speed up the solution of a large list of Ansys Mechanical jobs, typically more than 50000. Such analyses are performed by some script that runs each job in...

Homework Statement So I am currently in my final year working on my thesis. Below is the details of my thesis topic: Metacentric height (Computational) It is a simple matter to determine whether a body will float in a liquid, it is not so easy to determine the orientation at which the body...

Homework Statement So I am currently in my final year working on my thesis. Below is the details of my thesis topic: Metacentric height (Computational) It is a simple matter to determine whether a body will float in a liquid, it is not so easy to determine the orientation at which the body...

Hi all, "MECHANICAL FLOWER PROJECT" I'm working on a personal hobby art project (non-academic, non-commercial, non-governmental) where I'm mechanizing petals of a plastic flower. Basically, making petals curl open and close. *Please see picture and video. GOAL: To pull continously without...

I am an student of Materials engineering I'm 4th semester. I have always wanted to develop airplanes (I grew up close to an airport). I know for some articles on internet that Mechanical engineering is closely related to aerospace engineering. Over the 4th semesters in materials engineering I...

I'm currently double majoring in math and mechanical engineering. I am trying to figure my next schedule out for school and I was hoping you guys could give your opinion on what I should do. Thank you. These are the classes I am looking to take -Phys 2 -Phys 2 Lab -Statics -Linear Algebra...

I'm curious as to roughly how many mechanical engineering graduates have found jobs where they utilise the knowledge they gained in fluid mechanics, thermodynamics and heat transfer as part of their university degrees. Reason I'm curious is because, from my class, I'm not actively aware of...

Hello fellow PF members, Some background about me: I am currently a senior (actually is my 6th year in college) in Mechanical Engineering at Oregon State University. I am on track and will be graduating next summer. Given how long I have been in college, I would want to go straight to work...

Hey guys, I am currently studying Mechanical Engineering in the UK. For my final year, we have to basically invent or design something that hasn't been invented before or improve something that's already been invented.Now unlike my cousin who's studying Aerospace Engineering in the US, he told...

Hi guys, tomorrow I'll start my freshman year in Engineering. I like both mechanical and computer/software engineering, but, to be honest, on equal terms I would choose mechanical engineering, because I like dynamics. However I wouldn't mind being a computer/software engineer, since I'm a...

Hi I'm about to start my 3rd year in my Engineering university and would like some ideas for my Final Year project... We have 2 options. We can either make a model/prototype of something and present it OR we can do a research on a particular field. I'm leaning more towards the research side...

i'm not really a phycisist and to be really sincere i usually cannot answear my questions in class... so yeah, a question i have for a long time now is, which force anulates the gravity preventing a rock tied on a rope spinning over my head to fall and just stay fixed in his horizontal axis, the...

Hy please help me .i am strugling to calculate the mechanical efficiency of a compressor as i am not given power output and power output

Homework Statement The question is as follows: A man of mass 100kg is placed onto platform 1. The maximum weight that he can lift using this machine is twice his own weight (200kg*g). The mechanical advantage of the machine is constant. If the mass of the object is 100kg, 1) what is the...

ANSYS can be used to model creep in a number of different ways. If you are designing to ASME Section VIII, Div., 2 you might have to verify that your design meets the "shake down to elastic action" criteria. Basically, that means that the strains do not continue to increase over the number of...

All, I recently completed a project where transient thermal boundary conditions are rotated around a cylinder for a general number of revolutions. In reality, the cylinder rotated but it was much easier to rotate the thermal conditions around the model in the ANSYS environment. I used 360...

hi, can somebody pls help me with the model i have appended to this post? it is a simple thermal mechanical contact problem but i don't know what is wrong about it and why there is some errors in it after computing. thanks

Homework Statement A 5.0 kg block hangs from a spring with spring constant 2000N/m. The block is pulled down 5 cm from equilibrium position and given an initial velocity of 1.0 m/s back toward equilibrium. What are the a.) frequency b.) amplitude c.) total mechanical energy of the motion...

Homework Statement Three particles with masses m1=2.5kg, m2=1.2kg and unknown mass m3 are placed at the corners of an equilateral triangle of side 30.0cm. If the resultant force in x-direction acting on m1 is zero, find the net force acting on m1. Homework Equations F=(Gm1m2)/R^2...

i'm doing my second year B.tech in Mechanical engineering. value added courses such as: 1. lean manufacturing 2. six sigma 3. Quality Control 4. 5's when should i do such courses? should i do it while I'm working or in the third year.

I need a prototype built. The main design I have sorted out but need the engineer to tweak it here and there. I've tried googling it and the results are top companies which are very expensive, is there anywhere I could find an individual who can do this work for me? Or would any of yiu guys...

In what way does mechanical efficiency in gears affect output torque and angular velocity? Mechanical efficiency affects power which is the product of torque and angular velocity. Let's say we have a gearbox with a mechanical efficiency of 0.95, hence the output power is 95% of the input power...

Im interested in both civil and mechanical engineering but am still unsure on which one is best suited to me. I am am very interested in the Environmental side of Civil engineering as renewable energy fascinates me. However, I am more interested in machinery and cars than I am about bridges and...

Homework Statement Hi I am new to Physics Forums and desperately need some help! This is my first class back since undergrad and my math skills have gotten a little rusty. I think that's where I am failing. Okay here goes: http://tinypic.com/r/2zqf04k/8 There is a 4 subsystem...

Hello, I'm a first year student going into mechanical engineering at the university of Waterloo in Canada. I initially chose this because I really wanted to work either with satellites or nuclear power plants and my teachers advised that a mechanical engineering degree would net me easy...

Hello! My friend and i are interested in doing a project.My area of interest in Fluid mechanics and my friend's is mechanical design can you guys help us out by providing some topics of research which encircles both these areas.

Hi all! Currently I'm a business major and I realized after a month long car rebuilding project that I should probably pursue another major. My entire life I've been fascinated with building contraptions and what not. I'm pretty behind in the game right now, and would like to do as much...

Hey, this is my first post on physicsforum but I've read a lot on this website and the people here seem really insightful so I thought I would give it a try. I have a delimma, I'm in my last year of high school and am deciding which major to go into at the university of Alberta up here in...

Hello PF, Can anyone recommend a set of governing equations for the design of a simple elastomeric balloon that will expand to a "hotdog" shape when inflated to a certain pressure? I have the stress-strain curve for the material, I know what pressure I need to inflate it to, I just can't...

hello everybody, I will Study Engineering and I'm thinking to take your opinions in the major that i will study I'm Confused between communication and electronics engineering, mechanical engineering or civil engineering. I care about the job-market which one is the most requested ? . which...