Rigid Bodies Work and Energy Dynamics (Learn to solve any question)

Let's take a look at how we can solve work and energy problems when it comes to rigid bodies. Using animated examples, we go through kinetic energy, work, the principle of work and energy and much more, with step by step solved problems.

Principle of Work and Energy(00:00)
Kinetic Energy (00:21)
Work (01:45)
Mass moment of Inertia (03:58)
The 10-kg uniform slender rod is suspended at rest... (04:13)
The 30-kg disk is originally at rest and the spring is unstretched (06:35)
The disk which has a mass of 20 kg is subjected to the couple moment (08:12)

Book used: R. C. Hibbeler and K. B. Yap, Mechanics for engineers - dynamics. Singapore: Pearson Education, 2014.

[gamingcarnage]

man, you just put 2 weeks of lectures from my professor into 10 min video. I wish my professor can be like this and use the rest just to do practice problems

[Diggydogdraddy]

man i've commented before and I will comment again, these videos...by far....are one of the best educational (academic level) videos relavent to engineering/physics degrees I've came across. You are a legend, an absolute legend. Ive said that before and I'll say it again. I hope your channel grows and becomes one of those "oh have u watched khan academy's video on __?'. But this time we can say this : "Oh have you watched question solutions's anaswer on this"?

[pizzacake]

Mechanics final in 5 hours!! Ty so much for all these videos, really has helped so much throughout the semester!

[ShoncayPlays]

Thanks for these well made videos. They are particularly relevant for me right now seeing my Dynamics exam is coming up :) I can tell a lot of time and effort gets put into these videos and it surprises me that they don't get enough views.

[al-shaibynanong]

This is literally the "learn to solve any question". Thank you sir💙.

[jor]

The best physics educational channel on youtube, period

[Fahimsyd]

youre literally the GOATTTT. Thank you so much!!!

[bonkgaming]

You are amazing, that's it, i don't have enough praises for you brother, god bless you ❤️

[philipbecker]

Your entire series is so helpful to me. I am really really grateful. I'm not exaggerating when I say that I would not be able to pass my exams without you. Thank you!!!

[alsix]

Fantastic video! One suggestion would be if you think it would work with the way you do the videos is to show the full problem and write down all the given values upfront before you solve. I like to study for my exams by watching your videos. I pause them before you start the problem and I try to solve it first and then I watch you do it to make sure that I did it right. I really appreciate the content you create. Have a nice day!

[emmanlazo]

A two hour lecture was shaved off considerably with this discussion I very much appreciate your work sir

[filipposmichalopoulos]

Great work. You really helped me with my finals!! Keep going!!😊

[cactus_boy]

The video has helped me . Thank u so much

[jadkhalil]

Thank you so much I cannot express my gratitude!!!!

[pintblAnkwaziT]

I don't understand how you calculated work for weight. For the force we said s=r*theta, but for weight you didn't? Weight is creating resistance the entire 90 degrees, too - why wouldn't we multiply it by s=r*theta, too?

[bluejay]

Question on example 1:
Good day sir. When the rod is in a tilted position does the weight not depend on the angle b/w the horizontal and the bar, thereby not making it a constant force?

[absurds]

is it possible to solve these excercises with the previous methods, because all th problems look the same and i find it very difficult to know wich stratigy to use

[dylanw]

Do you have a video somewhere for calculating mass moment of inertia? Such as for non-common shapes, combinations, and ones which require integration?

[alf]

Can you explain how does the weight try to push the rod counterclockwise in the 1st problem?

[ogtripleg]

why is the work done by weight only multiplied by half the distance of the rod ? 6:20