Are you freaking kidding me?!? This was the most useful video on youtube ever!!! I'm in my 4th year of civil engineering school and I had many teachers talking about resonance and I have always learnt it because I read it so many times that I had it in my mind but I had never fully understood it. FINALLY I GOT IT. EVERYTHING IS SO CLEAR NOW, everything makes sense now!!!! THANK YOU... why do teachers just use numbers and formulas but they never show us real problems... everything would be so damn clearer....

@DocSchuster

10 жыл бұрын

Thanks so much for the note. I think as teachers, it's easy to forget the process of learning. Sometimes we can spend too much time simply saying smart stuff instead of trying to get the point across. Maybe your profs presume that some previous teacher has helped you understand, so they can focus on the math behind the understanding. As a learner, I know that math can get in my way if I don't have a working concept yet. Thanks for watching, Luca.

@alexandermtj655

10 жыл бұрын

I know what you mean, although im only in 11th grade :)

You sir, are one of the best teachers I have seen. If only you could replace my Physics teachers so I don't have to waste my time in a boring drone of a lecture, with no real life examples or visuals, only to come home and have to reteach myself by reading the book and watching teachers like you who do know how to teach. Perhaps you should make a career out of teaching teachers, lol. Subscribed.

@DocSchuster

9 жыл бұрын

sayinpower3 That's really nice of you to say. That's like a hamburger made of words, man. Thanks.

@MattGalter

7 жыл бұрын

Very nicely done except how come u don't mention aerostatic flutter which is the real reason for the collapse?

@MatheusSilva-dragon

6 жыл бұрын

Hey, that's almost the same situation of mine, sayinpower3! lol

You bet, CoolGuy. I'm glad you're still around!

WOW, THIS JUST BLEW MY MIND!

Best explanation ever, Thank you very much.

Thank you so much for this video you really helped me understand what resonance is!

Thanks so much! Your vids are really useful :) and they do help, especially when certain concepts are really dry :p and you're really enthusiastic too! Awesome videos :)

It feeds energy in and serves to increase amplitude. Driving force and damping force may cancel each other to lead to constant amplitude.

good stuff man, I was having trouble understanding the text book defenition but you made it verry clear

Really useful! love it!

these videos are so good, thanks a lot!

you are so funny ^^

Fun question! Timing is everything in a double-bounce, so I would agree. You're feeding energy into the system, which is not exactly simple-harmonic, but close. (You're a mass SOMETIMES on a spring...) If you exert your force at the wrong time, you could even slow the jumper down. It's just like if you tried to push your sister forward while she's swinging, but you pushed her forward just as she's going really fast backward...your timing sucks.

You are very welcome. I know it is easy to get bogged down by the math in physics. The math is VERY important, but I agree that it's easy to lose track of what is going on when the math gets too tricky.

Thankyou so much sir. as far as i can remember, during almost all of the physics leactures i've attended , i could barely keep my eyes open. so boring and things just flew over my head. but u'r lectures are not only fun and interesting but very helpful as well. plz continue to upload u'r videos cuz we students need passionate teachers like u very much.

oh thxn, this makes sense. Great video and keep up your good work, it is entertaining to learn

Love your’s explanation sir....just learned that resonance in school today but still not 100% understand it until I watch your’s

Super! More explanations from you! :-)

Haha great ending! So many things to explore...

Thank you very much :) greatly appreciated and have a nice day :)

@DocSchuster

10 жыл бұрын

You bet! I hope your day is great, too.

Very interesting Doc, you've cleared some of the fog in my head, especially about the driving force being applied at the right time and resonant/natural frequency, but I still need to take the pills because when you introduced 'friction' then that brought the mist down again I couldn't see how you could get a perfect cosine wave from eratic waves that were the driving force (or so I think))), but excellent video with a suitable amount of insanity. Thank you Doc.

Very nicely done except how come u don't mention aerostatic flutter which is the real reason for the collapse?

Hi Doc Schuster ! your videos are really helpful .....but i came across this particular formula where we can find the amplitude when natural frequency is close to the force driving and when it is apart....but i couldn't quite understand the derivation ...it would b really helpful if you could make a video about it !!!!! :D

Any plans to do Forced Harmonic Motion? Thanks for all the help Doc, you really are a great teacher!

I was interested to see why the bridge failed. And I'm so glad that I took calc 3 and can follow your explanation.

This might seem like overthinking and a bit esoteric and confusing, but I really need an explanation. When we’re talking about the natural frequency of an “object”, what is that object? Like if I slap the blanket on top of my body, is the resulting natural frequency that of the blanket, of me, or of the composite of both of us? And we can even get down to molecular and subatomic, I know that every element has its own resonant frequency, but then where does an object start and end? When does a thing become a thing? Because if we’re talking chemically bonded objects, I can see how that composite is considered connected/one object. But what about my blanket, it’s really just threads sewn together it’s not bonded to itself chemically, it’s only bonded by touch, yet it’s still considered a single object with a single natural frequency. This is all to say how come the Tacoma bridge was affected by a resonant frequency of its natural frequency and the ground surrounding it wasn’t? When the bridge meets the ground of the earth, just like my blanket it’s physically connected so why doesn’t that become one thing? How do the laws of physics separate the bridge from the ground but not my threads of my blanket from themselves? Intuitively this makes sense because of course I wouldn’t expect the earth to oscillate with the bridge but why?

Is this same concept why trampolines give you a "double bounce" at the right moment?

can u make more videos for oscillations and shm and maybe practice problems please

can you define driving force?? Is it the force that keep the amplitude constant?

The REAL reason the bridge collapsed is NOT resonance, it's flutter which u can see here kzread.info/dash/bejne/aJWdlLN_qLbaqNI.html "Aeroelastic Flutter- IS NOT specifically A RESONANCE because the input is not a periodic force, rather the input is uniform relative velocity of air and some object. Rather, aeroelastic flutter is an oscillation, which is any time the output of a system repeats periodically. dangerous phenomenon encountered in flexible structures subjected to aerodynamic forces. This includes aircraft, buildings, telegraph wires, stop signs, and bridges."

the last part, can i ask something? u say that the resonance of something is found when u hit it, "ting", but different sounds come out when u use different objects to hit the same sound. e.g, using a spoon to hit a table, and a drumstick to hit a table. so whats the real frequency?

@DocSchuster

10 жыл бұрын

EXCELLENT question. Holy cow. Here are my thoughts: 1) There are multiple harmonics of the resonance frequency present, and their relative abundances tell you EVEN MORE about the substance. 2) The harder you hit the dang thing, and the faster you get out of the way to let the object you're hitting shake, the more likely you are to hear higher frequency components of resonance. 3) The thing you're using to hit it is ALSO making noise. Thanks for making me think!

@win5128

9 жыл бұрын

Doc Schuster Any video on those thoughts? (Currently researching on Resonant inductive coupling. Maybe you can help)

@DocSchuster

9 жыл бұрын

Not yet. I have some interested local students, too, though... I'll give it some thought.

@OmenAhead

8 жыл бұрын

+Getenstute Sunny as a music producer, I can tell you this from my experience from sound designing. Objects most probably have 1 and only frequency (which might be static or dropping or increasing) and then there are more higher harmonics to that (or inharmonics, especially on metallic things). If you use another object each time for hitting it actually changes some of the other harmonics (same thing with getting a different sound each time from a guitar when playing with fingers and when playing with a pick). hope it makes sense :p

I'd like to see this investigated in relation to limbic resonance.

really you are amazing ^_^ we need that in our schools or colleges ------------ i need to study vibration with that ease i like it but i'm not that good, where to start Doc !!

@DocSchuster

8 жыл бұрын

+mostafa elnemr Hey, thanks! Check out my playlist on vibrations and waves. Hope it helps!

@mostafaelnemr68

8 жыл бұрын

thank you sir ^_^

@mostafaelnemr68

8 жыл бұрын

thank you sir ^_^

@mostafaelnemr68

8 жыл бұрын

thank you sir :)

@mostafaelnemr68

8 жыл бұрын

thank you sir :)

So who was "that man" who claimed he could tear down buildings with frequency?

Can you explain the Coral Castle made in Southern Florida years ago by a man from Europe for his true love who unfortunately never came to see it and marry him before he died? The hopeful lover never divulged his secrets, and would not allow any one to see him while he manipulated the large stones. Somewhow the guy was able to lift large stones weighing tons using some type of frequency. When some little kids from the area sneaked in one day to spy on him, they told their parents that he had what tooked like two ice cream cones in his hands and a radio on the top of a tripod and he pointed the ice cream cones so whatever energy/frequency was coming from them crossed at a certain point and the huge blocks would lift into the air and he could guide them carefully off the big truck. If we can figure this out, supposedly this is how the oldest pyramids (like the great pyramid) were built. Also, where a very old advanced civilization dug for gold in South Africa, these ice cream cone shaped rocks were found everywhere in the area. In South Africa, gold mining shafts were perfectly drilled far into the ground in perfect alignment by ancient master builders. Because it would mess up the currently agreed on timeline of man's development through time and probably for other reasons, the government there in recent times caps an ancient gold mine every time someone finds one to keep scientists from researching the sites. So, there must be some frequency of some type being used here to defy gravity. I think there are ley or lei lines as well where some of these unexplainable (as of yet) wonders were built or mines were dug. This is a video link of Coral Castle -- kzread.info/dash/bejne/dHqBsJeCqJnbqaw.html

N. Tesla rules.

On aderral?

@DocSchuster

10 жыл бұрын

Don't do drugs, kid. There's too much life to live for that crap.

ahahha simdi anladim senol hoca nerden gormus hxjxjxj

lmao, you probably goof around a lot

There were some "technical problems". xD

marry me