What is Mechanical: Definition and 1000 Discussions
Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches.Mechanical engineering combines creativity, knowledge and analytical tools to complete the difficult task of shaping an idea into reality.
The mechanical engineering field requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others. It is the branch of engineering that involves the design, production, and operation of machinery.Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century; however, its development can be traced back several thousand years around the world. In the 19th century, developments in physics led to the development of mechanical engineering science. The field has continually evolved to incorporate advancements; today mechanical engineers are pursuing developments in such areas as composites, mechatronics, and nanotechnology. It also overlaps with aerospace engineering, metallurgical engineering, civil engineering, electrical engineering, manufacturing engineering, chemical engineering, industrial engineering, and other engineering disciplines to varying amounts. Mechanical engineers may also work in the field of biomedical engineering, specifically with biomechanics, transport phenomena, biomechatronics, bionanotechnology, and modelling of biological systems.
I'm developoing one mechamical device, that we'll put two nutrunner in one gear. One spur gear will rotate the gear and put the nutrunner and one position. Each nutrunner will fix one bolt with 70Nm.
I need put one motor in pinion, but i need consider the moments to define de size of the motor...
TL;DR Summary: I'm trying to figure out why this answer is not correct for a mechanical impact:
"Conservation of energy and conservation of momentum can be used to find the relative velocities after the impact"
Hi! I have a multiple choice test that asks...
How did you find PF?: Google
I am working on a project that requires us to protect components from high heat. We were thinking on using sodium bicarbonate, but our module needs to be exposed FIRST to 85C for long periods.... then the high heat exposure will be present. We believe this...
At first I thought these values should be equal because I thought thermodynamic work is simply the work done as the gas compresses or expands. That is, the work done as the gas expands ( and the mass gets lifted up) should be equal to the work done against gravity as the mass goes up, and the...
Hello, My name is Ron. I am currently attending Old Dominion University majoring in Mechanical Engineering with a minor in Engineering Management. I am returning to obtain my bachelors at age 54 and currently hold an associate in Drafting and Design. I have worked in the construction industry...
Hi! My name is Kiran. I am a mechanical engineer working for various practical application projects such as renewable energy products, efficiency improvement, customized machines, etc. On many circumstances, I encountered with a problem of solving some advance and complicated physics. And in one...
Hello there, fellow physics enthusiasts, I am a mechanical engineer looking forward to pursuing physics academically.
I am interested in gaining knowledge from this forum and connecting with students and scientists.
Have a nice day, Madladkaiser
Hi all,
I need to derive an equation for the mechanical advantage between the force applied at the wall and the force at the piston for a linked system. I have attempted this but my equation suggests that the wall force increases expenantionally as the connecting rod approaches the horrizontal...
Is it correct that:
density = [ 0.09 * (density of NaCl) ] + [0.91 * (density of water) ]
volume = [ (volume of water) + ( { (volume of NaCl) / 48} * 9) ]
Thank you so much for any advice.
I started studying mechanical engineering, where I started thinking about things that might make me a successful and highly competent engineer in the near future.
Then I started searching through artificial intelligence tools for useful sites for me as a mechanical engineering student, and your...
What I did was split the problem into two seperate summations based on x & y coordinates:
Tcos(25) - Tcos(55) - Px = 0
Tsin(25+Tsin(55) +Py - Q = 0,
Where Q = 1860
I initially got an answer of 2391N, but it keeps marking me wrong for said answer.
This is the free body diagram, (the previous...
I am going to do some experiment on mechanical mechanism , studying stresses
Thing that in my mind
Arduino
Strain gauge
Instrumentation amplifier
I want to know that which Instrumentation amplifier i should use to get good output voltage from wheatstone bridge circuit and also easy to use...
Please see the attached sketch. Basically I have a system of three gear boxes, each with their own respective efficiencies. I'm trying to determine, at the end of this string of gearboxes, what the overall efficiency is. How might one go about determining this? Do you just take the average? 70 +...
Hello
I'm Mike. I'm a Mech Simulation Engineer. I am grateful with the help from this forum which directly solve my problem. Hope I can gain more engineering knowledge and experience, and also can help others.
Best regards!
First of all, the pulling force is
300N cos(30) = 260 N
At this point, I try to find the friction force
Fn = mg = 20kg * 9.81 m/s^2 = 196.2 N
Then,
Ff = μ * Fn = 0.5 * 196.2 N = 98.1 N
So after canceling the horizontal forces,
260N - 98.1N = 161.9N
And the acceleration will be 161.9N / 20kg =...
Good day everybody,
In a nutshell, I have to take the Wiesen Test for mechanical aptitude before this upcoming 24th, so less than a week from now. I am aware that this might seem a really simple task, and the theoretical concepts are indeed really easy, but the issue would be the timing; I will...
Hi, I'm putting together some resources about theories and would like some help to make sure I don't make a mistake.
In particular, I'd like to know if each of the electromagnetic, gravitational, mechanical and entropic processes applies to every physical process.
So, for example, due to an...
Why when we differentiate ## E = \frac {1}{2}mv^2 + \frac {1}{2}kx^2 ## with respect to time the answer is ## \frac {dE}{dt} = mva + kxv ##?
I though it would be ##\frac {dE}{dt} = ma + kv ##.
Many thanks!
Hello again!
I've found the capybara's EMA to be 0.71. Their mass to be 55kg. And their average speed to be ~3.0km/h.
I want to figure out how many capybaras it would take to overcome Friction * Normal force of ~125,000N. How would I go about doing that...
A certain mechanical appliance or device is given a rating that says, a certain operation or a certain movement can be performed some specified thousand times. What does the rating really mean? Was that movement or operation performed until the piece failed? Does it mean some advanced test...
The system is shown below. It consists of a rod of length ##L## and mass ##m_b## connecting a disk of radius ##R## and mass ##m_d## to a collar of mass ##m_c## which is in turn free to slide without friction on a vertical and rigid pole. The disk rolls without slipping on the floor. The ends...
I got a one liner for QP, Electron behave like wave when no observer is there but when we put observer ELECTRON saw this and they told themself hey they are observing us lets change our behaviour, WE are particle now. That type of strange QP is. Am I right?
So i am tried to conserve momentum and use conservation of mechanical energy but won't there be psuedo force acting on the block if i am solving from non inertial frame ?. If i ignore the pseudo force and simply use C.O.M.E and include the K.E of the wedge and solve normally i do get the...
For the first part, the mass sits at rest on the spring, so it is at the equilibrium position and thus mg = kd
So, d = mg/k
For the second part, I assume the uncompressed spring position is 0. When the mass at rest at the top. Its KE and PE is 0. When the mass at distance D, the question said...
Hi all
I have a question about this device in https://www.thingiverse.com/thing:2948680/files. Where can I find more information/reading material about this type of mechanical movement (for example, what is the ratio between the motor circle radius, pin location and the table bearings).
I wish...
I'm studying theoretical mechanics and I kind of find the notion of a "mechanical system" very slippery, especially when it comes to constraints. Take an example :
I know that when a system consists of N particles and p constraints, it has 3N-p degrees of freedom; this is the definition. Then I...
Hello everyone! I've been studying work and energy, and one problem I have is understanding conservation of mechanical energy. If on a rollercoaster you have two points A and B you expect the mechanical energy at A to be equal to the mechanical energy at point B, makes sense to me; but I started...
I am new here and I am seeking for help:) Thank you so much.
In engineering, electrical formula often analogy to mechanical formula.
eg. power[W] = pressure x volume flow rate vs power[W] = voltage x current
My question is could we make the simplest unit between electrical and mechanical...
I am unsure of what career to choose. I really like Physics and Math, and I have this desire to know more about things, which is what EP has to offer. I think that EP is mainly theoretical and does not teach many practice, but I believe that I can complement this by entering groups in my...
Hello, I'm confused between the difference between the thermal and mechanical efficiency of a Sterling heat engines or heat engines in general. I hope you could be able to guide and help me. Thank you
Good Morning
These documents suggest a good text on Vibrations.
https://www.academia.edu/34400682/Mechanical_Vibrations_4600_431_Example_Problems?email_work_card=reading-history
If you read the PDF, you see MANY example problems.
However, each and every one is an abstract schematic.
I keep...
Hello
I am reading the book :
" Planar Multybody dynamics, Formulation, Programming and Application"
An interesting lecture , however is it worthwhile studying these methods for kinematic and dynamic analysis of mechanical mechanisms?
I mean
There are many softwares on the market which make...
What is the difference between thermodynamic and mechanical work? Should they show equal values in an experiment? If yes, what possible errors could cause if there is a difference in their values?
Hey I'm Fraser,
I am a Strathclyde university graduate with a master's in electrical and mechanical engineering. I am interested in furthering my knowledge on quantum entanglement in relation to general dynamics. I am interested in researching its capabilities in ICBs. I hope I can find...
I am not sure, but below is my attempt.
In solids the force between adjacent atoms/molecules is very strong. So, when a part of the solid medium is displaced perpendicular to the solid medium like a rope, the atoms/particles in the medium just ahead of the displaced part will tend to bring the...
Hello
I am looking for a manufacturer or mechanic that can build my custom compound bow. It doesn't have to be a big business. I would appreciate any help.
Thank you
I had a homework question recently where I had gotten a bosun chair question wrong. It is the exact question found in this youtube video (with the values changed).
I am struggling to understand the way 2T is arrived at here (though I do understand this is an example of mechanical advantage)...
My reasoning is that the wire has a resistance/unit length. The resistance of AD must equal that of AB for D to be called a null point. If we move jockey to the left, the resistance of AD decreases, thereby decreasing the potential drop across it. This means that the V of D is more than that of...
On the surface, the equation is simply the peak rarefractional pressure divided by the root of the applied frequency:
##MI = \frac{P_{ra}}{\sqrt{f}}##
But the pressure is reduced/derated by an attenuation factor/coefficient that is dependent on depth and frequency e.g. ##0.3 \ dB / (cm \cdot...