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Mechanics Corner

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
DrD

DrD in Mechanics Problem

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Mechanics Corner

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
DrD

DrD in Mechanics Problem

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Mechanics Corner

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!!
DrD

DrD in Mechanics Problem

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Mechanics Corner

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
Electronic Components News

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
OLC-Frank

OLC-Frank

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Mechanics Corner

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
DrD

DrD

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Mechanics Corner

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
DrD

DrD

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Mechanics Corner

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
DrD

DrD

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mechanical

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
Natalie

Natalie

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Mechanics Corner

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
DrD

DrD

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Mechanics Corner

A Bad Example #49

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
DrD

DrD

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Mechanics Corner

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
DrD

DrD

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Mechanics Corner

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
DrD

DrD

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Mechanical Engineering Quiz Contest

Mechanical engineering login contest 1

To Encourage participation on Mechanical-engg.com, knowledge community for mechanical engineering professionals. 1 Login on 22 or 23rd January 2020 Mechanical-engg.com and update your profile. login link : https://mechanical-engg.com/login/ One Lucky winner will get Amazon Gift card (Rs 300 or 5 USD) This is the first contest and we are testing our mechanism... Be prepared for some exciting prizes in the upcoming contest. Make sure you are a mechanical engineer
admin

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Mechanics Corner

What Would You Like to Know?

What Would You Like  to Know? If you could ask me any question you want, what would you like to know that you think I might know? I certainly do not know everything, but through the years I have accumulated a certan amount of knowledge that I'd like to pass on to you. Therefore, I ask, what would you like to know? Many readers are still in college, and no doubt they would like to know what is going to be on the next exam. I'm sorry, but I have no way to know that. What I might be able
DrD

DrD

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Welcome at Mechanical-engg/com

Mechanical Engineering Forum Invitation

*Invitation - Only for Mechanical Engineers* Mechanical Engineering Discussion forums  *Forums Link*  https://mechanical-engg.com/forums/ To Login  https://mechanical-engg.com/login/ For quick login - you can login with Facebook, Twitter, Google etc. To Start new discussion : Click Start new topic button Start with Profile and status updates *Special Offer to encourage participation in the field of Mechanical Engineering*   Two Lucky members who logged in between 5
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Welcome at Mechanical-engg/com

get updates via whatsapp - Join whatsapp groups for Mechanical engineers

Dear Members, we will share quiz links,  questions, and discussion topics directly with whatsapp group. Please join only 1 group as - all groups will receive same posts  Only for Mechanical Engineers  They will be admin only groups ... you will not be allowed to post - Marketing people should not join these groups. All interaction will take place via websites Mechanical Engineering Group 101 https://chat.whatsapp.com/GUCrHpf4igeJxRXjthnzXw Mechanical Engineering Gro
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