Dynamics: Lesson 25 - Work and Energy Balance with Power and Efficiency

[@mohammadhamza3937]

Last Semester I did my statics and started badly but once I watched all your statics videos I was able to catch up and not only pass but get a good grade too. now I started my semester having Dynamics by watching your Dynamics playlist and I noticed that it is not complete. Is it okay if you complete the Dynamics playlist? I will really appreciate it and not only me but all your subscribers because we are all waiting for it and need it. Also thank you for all your hard work and effort.

[@roschan3704]

cheers to that

[@jacobmilburn287]

Please, please, please continue your course on Dynamics! It helps so much!! I do see by the time stamp that COVID-19 stopped your progress, but your videos have helped me through both statics and dynamics (until this point). Thank you!

[@user-ic8pr2tv5v]

Sir, when will you continue the dynamics course?

[@chochaormal1807]

Hello sir , I am a civil engineering student in kabul university of afghanistan, after watching your online courses, now I am enjoying my lessons. Thank you sooooooooooooooo much sir .

[@hamza_ME_]

Love your videos... Jeff please complete this course... There are so many waiting for more episodes...

[@acuteintermittent]

The only dynamics formula that matters jeff hanson=my hero Please keep doing Gods work in the direction of force

[@andresaasheim9695]

Jeff, I think I speak on behalf of everyone who has completed this playlist, Please continue this course on dynamics, WE NEED IT!!!!!

[@woodsmith_1]

Jeff Hanson is the GOAT A bit sad to have reached the current end of the dynamics playlist. It feels like stepping into the void. But I'm thankful for the excellent videos hitherto. Thank you Dr.!

[@mimo8198]

I really hope that he'll come back and drop the remaining episodes of this series in a few weeks. One can only dream. (Thank you for your hard work, it's really appreciated).

[@fargo8246]

Jeff, I am SO GRATEFUL for your videos. They have helped me understand these concepts when my Statics and Dynamics teachers completely failed me. Keep up the good work, sir because there are students that literally have to rely upon your instruction coupled with other KZbin examples. Learning from you has proven to be a billion times more valuable than chegging answers so, Thank you, Thank you, Thank you!!! Please give us all the instructions you can!

[@stevensteele2409]

Please come teach at Kennesaw State University. Most of my dynamics class is relying solely on you and Chegg. We all appreciate your lessons very much. We actually understand it when you teach it. Thank you!

[@mikelim7207]

Oh, no, I thought this was the end of it and Dynamics was that easy. Reading through the comments, it was clear that there are more to come. Please, Professor Hanson, I beg you to post more.

[@Yo-pn9qp]

Oh no! Please, please, please, make more videos for this playlist going into impulse, momentum, and the remaining chapters of Hibbeler's Dynamics textbook. We need you!

[@georgesadler7830]

DR. Jeff Hanson, thank for another fantastic video on Work and Energy Balance with Power and Efficiency. I watched and took notes on all 26 videos, and they are all amazing. I took Dynamics in the late 1980;s at the Old Catonsville Community College in Baltimore County, Maryland and it was nothing close to these great videos/lectures. I am doing many problems from the Engineering Mechanics Dynamics. 2nd Edition by R.C. Hibbeler. I hope that students appreciate your contribution to higher learning.

[@user-ic8pr2tv5v]

You are my lifesaver! Thank you so much. Please continue the course!

[@NICHOLASVALENTI-xp8jk]

Prof. Hanson. If you have the availability it would be well appreciated if you continued the rest of your dynamics online course. I know that a bunch of your subscribers would benefit from this. Thank you for what you've done!

[@kunalpatel597]

Hey Jeff, love your videos, they help out so much when studying! Just wondering if you will continue the Dynamics series with more videos involving the topics of impact, angular momentum and others topics found later on in the dynamics course. It would truly help a bunch having those videos later down the road for finals.

[@alanfuentes4078]

Please finish this dynamics course. You explain it better than almost any professor I have had.

[@Caroline-ot8jn]

Please Dr. Hanson, finish this series! you have no idea how much I desperately need your help!! God bless you.

[@bugrahanibicek8799]

Hi Jeff. You did a wonderful job with Statics and Mechanics of Materials courses. I passed all exams with completely understanding these two topics. So many students are waiting to Dynamics course to continue too. I hope you come back to continue Dynamics.

[@frozen420]

We're begging for guidance!!!! Please continue the course if you are able - from your humble CE student.

[@jackbryan5851]

Another good series. I really liked your statics and solids course. Looking forward to you finishing this class and thermo. Thanks for all your hard work.

[@TankiCubed]

I agree with everyone! PLease continue this course!! I love it and it helps so much

[@ursulavasquez8878]

Please continue to upload Dynamics videos!

[@normal_nom158]

We love you Jeff! Please continue the series!

[@jaysit7586]

Hey Dr Hanson. I’m going to take dynamics next semester. Can you please continue this course? Your statics course are super helpful for me

[@aga080]

PLEASE KEEP GOING!

[@susansanchez542]

Heyy professor I’m taking dynamics next semester with 14 other of my classmates we’re really hoping you’ll finish your dynamics lectures

[@pododododoehoh3550]

this was brilliant revision for the first half of my module, this would be such a gem fi you ever finish it. Either way thankyou for all the hard work you've put in here, you've made a big difference to the prospects of a lot of budding students.

[@LifeofFarhan]

Hello Dr.Hanson, I'm just going to say the say thing as everyone else. Please continue the course sir we beg you

[@jcnotnot8120]

Thanks Natalie!

[@lightningtech8025]

I love you videos, I hope they pay off as I am using them to prep for the FE and dynamics is something I struggled with because while Hibbeler is my favorite professor, his default course structure does not work for something as nuanced and varied as dynamics, his class and workload structure works great for mechanics of materials, statics, and every other class, but a test every week on 2 new concepts without paying mind to most of the old concepts was not the way for dynamics. I do have one suggestion for your videos. When you are done explaining the concepts and stating the problem, it would be helpful if you moved out the way of the board for a few seconds, so us at home who are trying to work it out on our own at first don't have to keep moving the video around when you in the way of something. Just a few seconds of only board would allow us to pause the video on those few seconds so we can try and work out before you write anything on the board. Also if you have to make a correction to the problem mid problem, try writing a comment about it on the video and pinning the comment, that way when we are trying to work it out, if we get stuck and feel like something is missing, we don't have to watch through half of the solution to see there was a mistake, we can always just check the comments and continue solving the problem without assistance (and hopefully getting it correct).

[@arif3124]

king of the dynamics please come back

[@scrpld7111]

Nice to see that you have made some new dynamics videos. I think I was missing these pulley and elevator stuff earlier from this online course. Nice stuff keep it going.

[@huntergirl7275]

I made a meme in the "Dave Chapelle crackhead" theme asking for more dynamics videos...but obv cannot post picture comments on youtube, and I decided it would be rude to just randomly send it to your school email. But...could you kindly please make some more Dynamics videos? Perhaps the meme should have been more in the theme of Oliver Twist... Also, you look great, good for you!

[@cindymarie5631]

your videos help me so so much please finish this course!!

[@147369852s]

Please continue with Dynamic courses.

[@Squiddy12]

Much appreciated as always!

[@praketakshantala2179]

Dr. Hanson, do you ever plan on finishing up this series? I would be really grateful if you do

[@biglow3933]

Hello professor hope you see this your vids help a lot I’ve used you for static’s and currently solids but I don’t see any fluid Mechanics lectures any recommendations of a fluids channel like the ones you have done for your courses

[@rastonick5891]

Dr. Hanson, do you have more videos coming? I am almost done with my statics course and I studied this in advance because I will be taking dynamics during our summer classes. Thanks!

[@sinamaihami9006]

Thanks Dr. Hanson please keep up the dynamic videos we are waiting

[@mahmoodsaharkhiz5959]

please make more courses you teach perfect and I am more interested more in engineering

[@multipleorganfailure3449]

Proffessor, please come back. The world needs you. We need you. I need you. Moreover, I require your presence through my various studies. Plese sir, be honouring us again.

[@areebahmedshariff2842]

Hey Dr Jeff, I hope you are doing well. Can you teach dynamic vibrations and instability in structures

[@martovify]

oh boy this isnt finished?, Im anxious D:

[@Peter_1986]

I think that he is using the book "Engineering Mechanics: Dynamics" by R. C. Hibbeler. Great book, actually - pretty challenging, but also well written.

[@XerathMTA]

​ @1234jhanson Do you have the rest of this course available for purchase somewhere? I would 100% buy it. thank you for being an amazing teacher

[@muhammadafaaq9126]

plz continue this course .

[@rossreidempasumbal1703]

What happens if the elevator isn't sitting on the ground? Example, it started 15 feet off the ground, do you still put the first PE & KE at 0 or do you solve it with the formula as well?

[@christophertermure3002]

Are you going to finish this series soon by any chance?

[@arguinmuffin8940]

when will you be uploading more dynamics videos??

[@hamokamarzari1681]

Please continue your LEDGENDARY course on dynamics

[@abdulrafay8620]

Sir, please complete the dynamics series. Love you from Pakistan 🇵🇰

[@j0semigue1]

Thank you for the videos statics, solids and this serie Could you Please, Please, please upload more videos in this curse and complete it. Thank you again u are the best in this

[@Omar-mm7ly]

Please continue the dynamics course, I beg you and we need you

[@ahmadhamdan7679]

please kindly continue the class

[@josefaustogomezcordero6542]

Please continue this videos

[@hamdyelkeshawy7918]

Thank you, you helped alot.

[@zacharywinger9250]

Natalie is the best SI there is!

[@Videos-os3cc]

when the world needed him most, he vanished.

[@jacobsabata8750]

Can you please finish doing this playlist?

[@skawwy32]

Any plans to host lectures like you've done with your statics course?

[@michaelcichanowsky1883]

When will more Dynamics videos come out?

[@alexdawson5331]

Why is the force in the final power equation 1500 lbs and not 500? Isn't the motor only supplying 500, and the pulleys are supplying mechanical advantage which gives the 1500?

[@canerdavarc4547]

Yeah , you re right but at that time the velocity of the cable connected to motor will change , if you remember from dependent motion. from there -3Va=Vb which will give the same answer.

[@alexdawson5331]

@@canerdavarc4547 Thanks!

[@oximas-oe9vf]

when will you continue this playlist please We need it

[@barskarabacak1056]

Do you continue the course

[@sofiamonroy7435]

BEAUTIFUL

[@omaralialyouzbaki7475]

Why does the course end here? I wish that you continue the course Pro Hanson

[@colerobison6916]

I'm wondering why we don't include the work done by gravity in the T1 + U(1->2) = T2 equation.

[@Peter_1986]

I believe that the term U(1->2) represents the change in potential energy. A different way to write this equation would be as T1 + U1 = T2 + U2; this means that both sides have a certain amount of kinetic energy and a certain amount of potential energy.

[@Sssmartking]

thanks alot!!, waiting a head for the next subject ;)

[@DrewFrig]

very cool

[@mihdicermik1363]

There was no next time :(

[@Joedex1625]

his professor hanson still around? I wonder when hes gonna make more videos?

[@1234jhanson]

I’m working on it. Still making videos every day or so

[@Joedex1625]

thank you thank you ! @@1234jhanson

[@markgrochal4122]

@@1234jhanson Hey Mr. Hanson, I am wondering if you would have the lectures released this semester. i am currently taking the class and learn the best from watching your videos on the class.

[@myoungchulhwang2910]

Can someone please explain to me why we don't consider the tension from the bottom (rope of) pulley A? cf. 3:25 minutes in the video.

[@canerdavarc4547]

Same thing , Ta=2T so there will be no change

[@MortezaNurcheshmeh]

Because the point of application for the force on the pulley does not move. When you apply a force but the point of application for the force is not moving, then no work is done by the force.

[@mayraloredo3251]

how can we help you continue the series?

[@1234jhanson]

I’m shooting new videos every day. I’m coming…

[@dominicsavinelli6179]

@@1234jhanson post please

[@Sergg04]

Anyone know what chapter this is?

[@DASmallWorlds]

Hello, I'm here to join the chorus of fellow students humbly asking for you to return to this series. It would mean a lot to us if you could please return for the remaining material, as this stuff is really tricky at times! Thank you/