Mechanical Engineering

# Blogs

## Mechanical Engineering Quiz Contest : Properties of Material

Do you know property of engineering material such as elasticity proof stress stiffness creep toughness tenacity brittleness resilience hardness ductility   Take a small quiz to test your knowledge Quiz Link One lucky winner who score 10 out of 10 will get Amazon gift Card Rs 500 (7 USD) Based on response we will have more such quizzes  Take the quiz in landscape view (Auto Rotate on mobile pho

## 5 tips to survive a Seminar successfully!

Seminars have always been an important aspect of education. It's an opportunity to either gain knowledge on an unknown topic or develop ideas regarding something you already know.It's a place where you meet highly skilled persons and get to know their recent researches.You should attend at least a couple of seminars annually to keep yourself updated about the advancements taking place in your field. I've seen many people who keep avoiding seminars, although interested, just because they have nev

## A-10

This is another incredible aircraft, essentially a plane built around a cannon. DrD

## SR-71

I've seen this plane close enough to touch it. It is the most frightening machine you can imagine. DrD   SR-71 Blackbird: The Cold War's ultimate spy plane     (Image credit: Lockheed Martin) By Stephen Dowling1st July 2013   Colonel Rich Graham spent 15 years as a Blackbird pilot and wing commander. He told BBC

## Wheel Climbing A Step

Mechanics Corner     A Journal of Applied Mechanics and Mathematics by DrD, # 55     © December, 2020                                                        Wheel Climbing A Step Introduction     The problem that follows was brought to my attention by a student at a great European university. It was a part of a much bigger problem with which the student was engaged, but this is quite enough to hold our interest. The results are differential equations of motion which could

## Mine Hoist Problem, Hint #3

Mechanics Corner A Journal of Mechanics & Mathematics by DrD, #54C                                                          Mine Hoist Problem, Hint #3   Introduction The original Mine Hoist Problem was posted 23 August, and it is not 10 October, over 6 weeks later. Thus far, I have not received any attempts at a solution. In this third (and probably last) hint, I want to explore some new ideas and also re-work much of the second hint in vector form. It will be

## Mine Hoist Problem, Hint #2

Mechanics Corner A Journal of Mechanics & Mathematics by Dr.D, #54 B                                                          Mine Hoist Problem, Hint #2 Introduction     The original Mine Hoist Problem was posted 25 August 2020, and the first Hint was given on 8 September. We are now almost one month into this problem, and thus far no one has sent me even so much as a question other than Tim Dennison's request for a video. I'm not quite sure how to understand this. I see

## Hint for Mine Hoist Problem, #54

It appears that only a very few folks are even attempting these problems, but it also appears that no one has sent me a solution. For that reason, a small hint seems to be in order. Hint: Turn the picture upside down. For most of us, it is conceptually easier to think about the problem if the X-axis goes to the right and the Y-axis is upward. Of course, if you do this, you must recall that gravity then acts up, not down. Don't be shy; give it a try!!

## Mine Hoist Problem, #54

Mechanics Corner     A Journal of Applied Mechanics and Mathematics by DrD, # 54     © 25 August, 2020                                                          Mine Hoist Problem Introduction     As we saw in the previous problem (A Hoisting Problem for Engineers, #53), hoisting problems can be fun. This has gotten me to thinking about some other hoist related problems, and here I present three variations on a new problem. The problem is much the same in all three cases, with

## What options do I have for an electronics component going end of life?

The constant evolution of technology has meant that companies in the technology sector must adapt every day. For this reason, many mechanisms have been created to reduce production costs and increase the productivity and efficiency of their business models. So, we will talk about obsolescence, or end of life of the electronic components we use every day. What options do we have for an electronics component going end of life? Since, as mentioned above, part of the companies' strategies are based

## A Hoisting Problem for Engineers, #53

Mechanics Corner, #53 A Journal  of Applied Mechanics and Mathematics by DrD                                                              A Hoisting Problem for Engineers                                                        A Learning Experience in Machine Design There is a document available on the Internet at several locations with the title 2.003 Problem Archive by MIT Professor David Trumper, Last Updated April 19, 2005. It is a collection of engineering problems, some

## Suddenly Lifted Bar - Revised

The previous post on this topic was certainly acceptable for engineering purposes, but there was one small oversight in the model. Many would actually prefer that oversight because it makes the algebra quite a  bit less complex. Even so, it is not quite correct, so this revised post is offered to correct the oversight. There are also a few additional comments that may be of interest, and a final question for the readers to consider. DrD LiftedBar_Revised.pdf

## Suddenly Lifted Bar

Mechanics Corner     A Journal of Applied Mechanics and Mathematics by DrD, # 51     © 4 July, 2020   Suddenly Lifted Bar Introduction     In the Forum section, under the Machine Dynamics and Design Considerations heading, Mr. Negar Rahbar has posted a topic, Bending Moment. It is a problem he found in an older textbook (one that I might have studied back in my college days, although in this case, I did not), a book titled Theory and Problems of Machine Design by Allen

## 5 Technologies Driving MEP Sustainability

Nowadays, the construction industry is echoing with the word "Sustainability." Everyone seems to be focused on finding more sustainable design solutions for building structures and objects.   The moment we realized that we would have to work on installing eco-friendly systems to help the planet recover from the damage done by human hand, most new construction projects were required to be eco-friendly.   However, going green isn't as simple as it sounds. It's a huge challenge, and worki

## My First Talk on Mechanical Engg. Online Mechanical Engineering conference Invite

My First Talk on Mechanical Engg.  https://flipgrid.com/mechanicalengineer You are invited to share your first talk on Mechanical engineering topic. Select any topic related to mechanical engineer ... Record your video and upload with your selfie. on https://flipgrid.com/mechanicalengineer Maximum Time length 5 Minutes  Language to be used is English only

## Why You Shouuld NOT Use the D'Alembert's Principle

Mechanics Corner   #50 A Journal of Applied Mechanics and Mathematics by DrD                                    Why You Should NOT Use the D'Alembert's Principle I think it is safe to say that every engineering student studies both Statics and Dynamics. We are told that Statics is easier than Dynamics, which is often true but not so in all cases. When we get to Dynamics, many teachers, particularly physics teachers, will urge the use of something called D'Alembert's Principle. The

Mechanics Corner A Journal of Applied Mechanics & Mathematics, #49 A Bad Example Most of us are inclined to trust an established textbook. We assume (1) the author knows what he is talking about, (2) the book has been carefully vetted by several editors and reviewers, and finally (3) the fact that it is well established in the market means that thousands of other readers have tacitly endorsed it as well. While these assumptions are usually true, they are no guarantee, and they

## Which of the following material is most elastic?

Which of the following material is most elastic? A.      Rubber B.      Plastic C.      Brass D.      Steel E.       Glass

## Governor sensitivity is the ratio of

Governor sensitivity is the ratio of A. range of speed to the mean speed B. maximum speed to the minimum speed C. mean speed to the range of speed D. effort of governor to the range of speed E. governor lift to the range of speed

## Evaporative capacity of boiler is expressed as

Evaporative capacity of boiler is expressed as a. kg of steam produced b. steam pressure produced c. kg of fuel fired d. kg of steam produced per kg of fuel fired e. kg of water evaporated

## New Help Site

I'd like to invite all readers to visit my new website: Machinery-Mechanics-Professor.site I'm offering free help for engineering students through that site, so come on over and take a look. DrD

## When You Ask for Help ....

Today, I have a question for readers. I'd like to get everyone who is willing to answer the same question, but also tell me whether you are a practicing graduate engineer or if you currently a student. I think these two groups will answer somewhat differently, so it is important that you identify which one you fall into. The question is really simple: When you ask for help, what do you really want? Are you asking for someone to step in and solve a problem for you? Or, are you asking for a f

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