Introduction to Conservation of Mechanical Energy with Demonstrations

[@muutrich]

4 years later and you're still helping people such as me! I love this channel❤

[@FlippingPhysics]

Yep!

[@Lisa-rg8uq]

8 years later and this still helps

[@ahmadnawazkhan1651]

I used to think that people who have millions of views must have explained things better but you proved me wrong. Subscribed!

[@FlippingPhysics]

I do wish this video had millions of views. Someday?

[@dianampm99]

This is the best physics channel ever. Thank you so much for doing these videos!

[@FlippingPhysics]

Thanks and you are welcome!

[@goodmomentsgoodthoughts3236]

This is the best video worth million views.. Thanks a lot.. Lots of respect from india..

[@ahmedmamdouh3579]

I usually do not comment on youtube but man.. your lesson is awesome! I can't imagine how much effort you've put into making this, but it completely pays off! (glad to see subtitles as well)

[@learningisecstatic9348]

This channel should have billions of subscribers. Best ever channel to learn physics.

[@FlippingPhysics]

I completely agree.

[@rubysunn976]

I finally understand physics... thank you Universities

[@rakibulhasan-yv8fr]

I really appreciate you. 6 years ago you made this content and still know it's helping students and the system you used for making content that's unique and cool. Love you from Bangladesh.

[@FlippingPhysics]

So glad to help!

[@babby2ify]

Best explanation on KZbin! Hands down!!!!

[@pukamon1681]

Such a simple concept when explained well and thoroughly. Thanks for this vid, Mr. P.

[@FlippingPhysics]

+Puka Chi You are welcome and I totally agree it is a simple concept. 😊

[@FreeShaima]

Omg your channel is amazing and really super super helpful! Thank you so much physics flipping!

[@kushagrapandey8835]

Best physics channel ever. The way he explains is damn high. I really love it.

[@FlippingPhysics]

Thank you! So glad to help you learn.

[@drunkslav7280]

this is off topic but I love the sound your board makes when you write on it at superspeed

[@FlippingPhysics]

+thedarkone Actually, me too. I run those parts through a "treble reduce" audio filter, otherwise it sounds too high pitched and annoying. Now it sounds pleasant.

[@Y2JRedskins]

you deserve so many more views! the work you put into these videos is nearly unparalleled ;) BTW is Mr. Terry winner of Big Brother 14 Ian?

[@FlippingPhysics]

+Y2JRedskins Thanks. Hopefully time will deliver the views you feel I deserve. Yes, Mr. Terry is Ian Terry the winner of Big Brother 14. It was very nice of him to drop an object for one of my videos, agreed?

[@Y2JRedskins]

Agreed ;)

[@samuelunderwood5286]

I thought I recognized that guy.

[@LEIITIS]

You’re brilliant seriously I always come to your videos before my test because it clarifies so much that was missing in my understanding. I appreciate the work and passion you put into teaching us. You deserve way more credit. 🙏🏼🤗🙌🏼

[@BoZhaoengineering]

I like the way you explain it. The Concept is explained very clear! Thank you.

[@FlippingPhysics]

Glad you liked it

[@Kyrowebb]

Honestly you are amazing at explaining physics, keep it up!

[@FlippingPhysics]

Thanks. I will continue to keep working on it. How about you keep on learning?

[@jahshante95]

At 1:28 seconds was that a typo where it says that the mass is 3.8? Or is it suppose to be 3.6?

[@FlippingPhysics]

Bummer. The mass of the dropped object was 3.6 kg. Sorry about that.

[@jahshante95]

Okay great, thank you so much for helping me understand!!!!!! 😁😊

[@alexandrabarajas5939]

I love this new approach! Thank you!

[@FlippingPhysics]

You are welcome. Although it is not a new approach for me. I've been doing this for five years.

[@rachelprince1970]

you are literally saving me from failing my physics class right now THANK YOU SO MUCH MR. P

[@FlippingPhysics]

You are very welcome. Glad to help! You can help me too: www.flippingphysics.com/help-out.html

[@xenon3148]

It's my first time seeing your videos and I love your creativity! Hope you've been doing great!

[@skiply8505]

great work explaining. And looking through those comments and seeing that they are old like its 2020

[@WarriorAjk]

I got a question. What if I don't have a height, instead I have a length. Like in the case of a pendulum striking a wooden block. Do I measure the distance between the wooden block and the launching or the pendulum or do I measure how high the pendulum goes? Thanks

[@FlippingPhysics]

+Brookie The gravitational potential energy of the pendulum depends on the "vertical height above the horizontal zero line". In other words, with regards to the gravitational potential energy of the pendulum, the displacement of the pendulum in the x-direction is irrelevant, only the displacement of the pendulum in the y-direciton matters. Both of these in-class lecture videos of mine might be helpful. kzbin.info/www/bejne/npWzfqysfLaHaa8 and kzbin.info/www/bejne/nIfVgIGvqrt4oas

[@biledionez9014]

From the idea that energy can not be created or destroyed and only transferred: If i am applying work at an object causing it to accelerate forward, it gains kinetic energy while its potential energy stays the same, that means i am transferring energy to it, right? If so, what kind of energy was this inside my body before being transferred and becoming the kinetic energy on the object?

[@oweznero]

bile dionez it's also elastic potential energy

[@ararararara902]

Chemical energy inside your muscle cells, I guess?

[@HGCrawfish]

Is this Ian that won Big Brother at 0:37?

[@FlippingPhysics]

+HGCrawfish Yep. Note: Often questions like these can be answered by reading the descriptions of videos. :)

[@WarriorAjk]

This makes so much sense!

[@FlippingPhysics]

+Brookie The sentiments are appreciated, however, the expletive is not. Sadly, I am going to have to remove your comment if you do not rephrase your comment to something more appropriate. Thanks again for the compliment though.

[@WarriorAjk]

Flipping Physics Hahaha ok man! But keep up the work xD!

[@FlippingPhysics]

+Brookie Thank you for your appropriate, supportive comment. 😉

[@WarriorAjk]

anytime!

[@clintn.kildepstein1656]

YOOO IAN TERRY

[@aniketprasad7700]

I have one question Mr P , if in the pendulum example the energy is conserved shouldn't the pendulum swings infinity ?

[@FlippingPhysics]

Yes. In the absence of friction, the pendulum will swing with the same amplitude forever.

[@ajaysinghthakur1411]

Best explanation

[@shivamkokane7885]

You are awesome and deserve to be shared, thx so much

[@FlippingPhysics]

You are welcome so much. I hope you learned.

[@maddiechapman7986]

Wait why is the mass 3.8?? Shouldn’t it be 3.6? In both equations?

[@LittleKokasLife]

Since there is air resistence should not the mechanical energy decreases as it falls down? Can we view it as a friction?

[@FlippingPhysics]

+Andre Silva Generally we assume air resistance is negligible, which it certainly is in this example. In this case what I mean by "negligible" is that, yes, a very small amount of mechanical energy is converted to heat via friction with the air as the ball falls, however, it is such a small amount that it doesn't effect the problem at all. For more on this, see www.flippingphysics.com/the-euler-method.html where I go through and calculate the effects of the force of drag on an object in projectile motion.

[@keenobaerry3195]

it feels like my college professors are really trying to make physics as boring as possible. i can't thank you enough for being the counterforce in the world of physics. Conservative of Physics Interest

[@crontsquared230]

Absolutely amazing video! Tysm!

[@natalielopez6738]

when solving problems on the AP test should we plug numbers into the equations with their units? Also any tips for last minute learning before my test on May 3?

[@FlippingPhysics]

+Natalie Lopez With regards to what you should do when solving problems on the AP test, I model that in every problem I solve in the videos. Here is a good example: www.flippingphysics.com/wf-problem-billy.html Any tips I have for the AP Physics 1 Test I have in May are at www.flippingphysics.com/ap-physics-1-review.html

[@natalielopez6738]

thank you!!

[@amartrivedi3522]

You deserve more view's

[@learningisecstatic9348]

Sir you have said that mechanical energy is conserved when there is no force applied. But the two relavent examples you have demonstrated force of gravity is being constantly applied. Please help sir.

[@FlippingPhysics]

1) Mechanical energy is conserved when there is no work done by a force applied and no work done by a force of friction. 2) The force of gravity is not a force applied.

[@learningisecstatic9348]

@@FlippingPhysics yes got it sir. Thank you.

[@carultch]

@@learningisecstatic9348 By "force applied", he usually means forces of human intervention, rather than forces in general.

[@rohanr5150]

Wouldn't the centripetal force be the Fa in your pendulum example.

[@FlippingPhysics]

Not sure what you are asking, however, this might help: www.flippingphysics.com/water-bucket-analysis.html

[@owaismaqbool234]

Sir would u make a video on conservation of mechanical energy of a system comprising of two particles like that of a pulley

[@owaismaqbool234]

What i want to say is how to make an equation of conservation of mechanical energy of two particles in the system

[@owaismaqbool234]

Both connected

[@roshnirodriguez2952]

your videos are amazing! But why is the acceleration due to gravity positive for PE=mgh?

[@FlippingPhysics]

+Roshni Rodriguez The acceleration due to gravity, g, is, and always has been, positive. kzbin.info/www/bejne/rKrZda1_Z5emhacm26s

[@mikko_musik]

The Dance of the Pendulum, a thing of beauty ;)

[@26goldnugge]

What causes the pendulum to stop?

[@FlippingPhysics]

In the absence of friction, nothing, it will never stop. If friction exists, then friction.

[@rodrigourbizo9937]

Awesome!!!!

[@lumrikano4230]

BEST VIDEO

[@abdulyusuf1221]

Can you please do a video on Physics ii

[@FlippingPhysics]

+Abdul Yusuf I appreciate your wish to have me do videos that cover the AP Physics 2 topics, however, my current priority is AP Physics 1 and then AP Physics C: Mechanics and then AP Physics C: Electricity and Magnetism and then AP Physics 2. In summary, AP Physics 2 isn't to happen for a very long time. Sorry.

[@abdulyusuf1221]

+Flipping Physics It's okay, just keep up with the good work. and thanks for all the videos they are really helpful

[@haynecoralde3903]

Thank you for this!

[@FlippingPhysics]

You are welcome!

[@albertyeung5787]

excellent explanation

[@Esparsero]

Thank you so much!!!🙏

[@FlippingPhysics]

You are very much welcome!

[@basalirwajesse737]

Just a qn on the table you showed how does the object possess speed yet it's on the ground at 0m?

[@ranawalid9947]

thank you so much this really helped !!

[@FlippingPhysics]

You are very welcome.

[@maryahalkhwildi9223]

Thank you so much 🌹🌹

[@FlippingPhysics]

You are welcome.

[@jeanatienza1247]

Thank you!!!!

[@valeriadiaz1093]

Love it 👌

[@FlippingPhysics]

You are welcome!

[@karo.k.8515]

Thank you MR.P And Bob I forget other name sorry😁 but Thanks for all🙃💚💛❤🖤🧡

[@FlippingPhysics]

You are very welcome.

[@mysterykidzfli]

Who else is watching this for online school bc of corona??

[@GoodAudioBro]

Houston Texas!

[@sakshilonkar5988]

Best physics

[@FlippingPhysics]

Thanks. Glad you think so.

[@pedroleon4421]

the houston guy looks like he was being held at gunpoint

[@abetterworld8698]

Nicee😍👍

[@deepthrought]

The dance of the pendulum. Who remembered the dance of the dragons? 😂

[@Uncertaintycat]

nice shockwave there in the camera at impact

[@FlippingPhysics]

That is actually the mass causing the ground to shake which caused the camera to shake. I thought it was pretty cool too.

[@benjaminherbst6048]

This man got the guy from big brother 😂

[@Gserrano27]

Physics teachers are to be forced to show your videos to students

[@FlippingPhysics]

That probably would not work out so well.

[@vic7926]

My teacher does for homework

[@weirdyetunique]

I love how that kid still wants his 2 dollars

[@FlippingPhysics]

To this day...

[@benziervogel7285]

“Weed makes you lazy”

[@xishnik01]

they are not using calculators xD

[@purplegirl6176]

firstt