Bells, Opera Singers, and the Tacoma Narrows Bridge - Resonance is Everywhere! | Doc Physics

Driven simple harmonic motion, friction, and uncontrolled increase in amplitude.

Пікірлер: 59

  • @lukenes90
    @lukenes9010 жыл бұрын

    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

    @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

    @alexandermtj655

    10 жыл бұрын

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

  • @sayinpower3
    @sayinpower39 жыл бұрын

    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

    @DocSchuster

    9 жыл бұрын

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

  • @MattGalter

    @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

    @MatheusSilva-dragon

    6 жыл бұрын

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

  • @DocSchuster
    @DocSchuster10 жыл бұрын

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

  • @reallychillysummer
    @reallychillysummer9 жыл бұрын

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

  • @agqy9719
    @agqy971910 жыл бұрын

    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 :)

  • @DocSchuster
    @DocSchuster11 жыл бұрын

    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.

  • @DocSchuster
    @DocSchuster11 жыл бұрын

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

  • @almas702
    @almas7028 жыл бұрын

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

  • @gigiduru125
    @gigiduru12511 жыл бұрын

    these videos are so good, thanks a lot!

  • @jordisardansmorral8446
    @jordisardansmorral844610 жыл бұрын

    Really useful! love it!

  • @tiaanjansevanrensburg2762
    @tiaanjansevanrensburg27623 жыл бұрын

    Best explanation ever, Thank you very much.

  • @ayesharafi9502
    @ayesharafi95028 жыл бұрын

    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.

  • @ifoxrider
    @ifoxrider11 жыл бұрын

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

  • @oshinalagiyawanna24
    @oshinalagiyawanna243 жыл бұрын

    WOW, THIS JUST BLEW MY MIND!

  • @romanglushenok5631
    @romanglushenok56317 жыл бұрын

    Super! More explanations from you! :-)

  • @adrin0252
    @adrin02525 жыл бұрын

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

  • @MrHuno92
    @MrHuno9210 жыл бұрын

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

  • @ffmilktea
    @ffmilktea8 жыл бұрын

    you are so funny ^^

  • @alexandermtj655
    @alexandermtj65510 жыл бұрын

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

  • @DocSchuster

    @DocSchuster

    10 жыл бұрын

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

  • @96RyanC
    @96RyanC8 жыл бұрын

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

  • @keerthanaputhuvaya8893
    @keerthanaputhuvaya88939 жыл бұрын

    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

  • @DocSchuster
    @DocSchuster11 жыл бұрын

    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.

  • @Ayaforshort
    @Ayaforshort6 жыл бұрын

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

  • @MattGalter
    @MattGalter7 жыл бұрын

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

  • @mvdmusicvideostorefreshthe3224
    @mvdmusicvideostorefreshthe32242 жыл бұрын

    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.

  • @vaniyatariq3826
    @vaniyatariq3826 Жыл бұрын

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

  • @dylanneal8131
    @dylanneal813111 жыл бұрын

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

  • @ifoxrider
    @ifoxrider11 жыл бұрын

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

  • @pfreddyp
    @pfreddyp9 жыл бұрын

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

  • @SuperJgan
    @SuperJgan10 жыл бұрын

    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

    @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

    @win5128

    9 жыл бұрын

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

  • @DocSchuster

    @DocSchuster

    9 жыл бұрын

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

  • @OmenAhead

    @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

  • @mostafaelnemr68
    @mostafaelnemr688 жыл бұрын

    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

    @DocSchuster

    8 жыл бұрын

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

  • @mostafaelnemr68

    @mostafaelnemr68

    8 жыл бұрын

    thank you sir ^_^

  • @mostafaelnemr68

    @mostafaelnemr68

    8 жыл бұрын

    thank you sir ^_^

  • @mostafaelnemr68

    @mostafaelnemr68

    8 жыл бұрын

    thank you sir :)

  • @mostafaelnemr68

    @mostafaelnemr68

    8 жыл бұрын

    thank you sir :)

  • @d2vid5
    @d2vid57 жыл бұрын

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

  • @MattGalter
    @MattGalter7 жыл бұрын

    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."

  • @anneteller3128
    @anneteller31287 жыл бұрын

    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

  • @pokerzec9800
    @pokerzec98008 жыл бұрын

    N. Tesla rules.

  • @floga10
    @floga10 Жыл бұрын

    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?

  • @tuck295q
    @tuck295q10 жыл бұрын

    There were some "technical problems". xD

  • @Mehmethanucel
    @Mehmethanucel8 жыл бұрын

    ahahha simdi anladim senol hoca nerden gormus hxjxjxj

  • @Squighopper25
    @Squighopper2510 жыл бұрын

    On aderral?

  • @DocSchuster

    @DocSchuster

    10 жыл бұрын

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

  • @ifoxrider
    @ifoxrider11 жыл бұрын

    lmao, you probably goof around a lot

  • @mariamoine4327
    @mariamoine43275 жыл бұрын

    marry me