Resonance and Natural Frequency Explained

What is the natural frequency?
What is resonance?
A Level Physics topic suitable for all exam boards including AQA Physics, OCR A , OCR B, Edexcel A Level Physics, suitable for A Level Physics Revision on oscillations.
Music credit for the intro: Royalty free music from Ben Sound
Chapters:
00:10 What is natural frequency?
01:02 What is resonance?

[@arsjukebox5119]

Nice! We can also see the formation of standing waves, 2 birds with one stone

[@zhelyo_physics]

Oh, didn't actually realise that! 😅 thanks!

[@ramanshushukla274]

Best video on natural frequency and resonance.Thankyou

[@zhelyo_physics]

Thanks a lot! Much appreciated!

[@ertanfisek8131]

paused the video halfway to say this : u look jacked man ;)

[@luddy20]

literal goat thanks so much all the other explanations from other people were so confusing!

[@zhelyo_physics]

Thanks a lot! Much appreciated!

[@lukbrowncs]

Brilliant video. Thank you for the explanation!

[@zhelyo_physics]

Anytime! Thanks for the comment!

[@tanmayjoshi5521]

Thanks for the demonstration!

[@zhelyo_physics]

anytime!

[@abdulatifsuleiman6306]

great work brother keep it up (all the way from kenya)

[@zhelyo_physics]

Thank you very much!

[@sonniamoses2959]

Very easy to follow thank you!

[@zhelyo_physics]

anytime! thanks for the comment!

[@khaledhbenhusainbenhusain404]

thanks so much, it is very useful, excellent presentation

[@zhelyo_physics]

thank you for the comment! Much appreciated!

[@jacob.9664]

Great video, thank you!

[@zhelyo_physics]

thank you for your comment!

[@boskadoff]

Very helpful, thank you!

[@zhelyo_physics]

Thanks a lot for the comment! Glad to hear it was helpful!

[@physicslover909]

Amazing video thank you a lot!!!

[@zhelyo_physics]

anytime, thanks for the comment!

[@augustreigns9716]

thank you

[@zhelyo_physics]

My pleasure! Glad it was useful!

[@pitad2766]

great video!!

[@zhelyo_physics]

thanks a lot!

[@pingu8394]

Superb demonstrations!!!!

[@zhelyo_physics]

Thanks a lot for the comment!

[@shachirai6873]

Thank you very much

[@zhelyo_physics]

Thank you for the comment!

[@flowmeters-tx]

Best explanation so far

[@zhelyo_physics]

thank you so much!

[@Swaeg]

Nice video :)

[@zhelyo_physics]

thank you for the comment!

[@sangeetarani5111]

Nice explanation

[@zhelyo_physics]

thanks a lot!

[@basomahassoun8191]

Many thaaaaaaaaaaaaanks

[@zhelyo_physics]

Anytime! Thanks for the comment!

[@EMAGA]

What is the natural frequency of the human body and what is the best way to manipulate it? Is it possible to adjust using sound as some have suggested?

[@VishalSharma-zf3xk]

I am also wondering same

[@haroonsharif8411]

King explaining physics

[@zhelyo_physics]

Thanks a lot!

[@VishalSharma-zf3xk]

Hello, Sir. I never had chance to study physics. At this stage of life I found physics so inyeresting. My question is: Is it possible to change the locational variable in the enery equation of an object to another locational variable?

[@ashoktherainman]

What percentage of total mass can be at resonant frequency and still acceptable for the total system? I can’t find any standard about this.

[@zhelyo_physics]

Hmmm I'll look into it, interesting

[@Andonchoto]

Great video, thank you, is there a way to measure the base frequency that a human emits?

[@zhelyo_physics]

humans and most objects at room temperature emit infrared radiation.

[@Andonchoto]

@@zhelyo_physics can it be measured sir?

[@scienceexperimentsscientif1127]

Excellent explanation sir.I have a question.Let's say a tuning fork has a natural frequency of 250 Hz and we hit it against the table, does that mean a tuning fork is oscillating back and forth 250 times a second or a tuning fork is creating a sound wave that has a frequency of 250 Hz or both of them?

[@zhelyo_physics]

Excellent question, both of them!

[@scienceexperimentsscientif1127]

Thanks sir.My doubt is cleared.

[@zhelyo_physics]

anytime!

[@syedumarjunaid5499]

Can a artificial resonance frequency, which is equal to the natural resonance frequency of a metal object, deform metal object i.e. can change its shape?

[@zhelyo_physics]

Absolutely! Search on you tube for a famous case of a bridge getting completely deformed by wind - I think it was the Tacoma narrows bridge.

[@hardikb15]

@@zhelyo_physics there's also the infamous millennium bridge of Thames

[@zhelyo_physics]

thanks for the idea actually! I might see if I can film a video there!

[@shayanelhoque6929]

So if I were to take 2 mounted tuning fork and tap one of them, would both vibrate at the same frequency regardless of the other tuning fork's size?

[@zhelyo_physics]

Mmm I am pretty sure that mass will be a contributing to a different natural frequency. Worth experimenting though with this!

[@viihunnid7099]

So how do we measure these frequencies… Most importantly how does one measure specifically the frequency of a static object to when the object is disturbed from a specific location?

[@zhelyo_physics]

So we apply a force and measure the time period of the oscillation with respect to the point. Typically we measure 10,20T and then divide by the number to get an average. Afterwards f=1/T

[@yoihenbath]

Thank you you are so so so goo❤❤❤❤❤❤❤❤❤❤❤❤❤❤dddddd

[@zhelyo_physics]

anytime! thanks for the comment!

[@naveensingh5787]

what are the factors on which natural frequency depends?

[@zhelyo_physics]

kzbin.info/www/bejne/i3OueKaNmpl1o8k Excellent question! In the linked video I derive it for a simple system, but every system will have a different equation or motion but this would give you an idea of how it is derived. Hope it helps!

[@naveensingh5787]

@@zhelyo_physics you are life savor sir

[@muhammadfaizanalibutt4602]

Does the natural differ based on how or how much we initially disturb the system

[@zhelyo_physics]

interestingly, no, the frequency is independent of the amplitude. Excellent question!

[@solapowsj25]

An unloaded truck 🚛going fast on a new highway suddenly broke down due to resonance in the crankshaft (perhaps coinciding with the power stroke).

[@BM-vl6bo]

Does natural frequency change if you apply more tension or force though?

[@zhelyo_physics]

Depends on the specific situation. Generally objects tend to oscillate at an unchanged frequency once the forced that caused the oscillation is removed.

[@BM-vl6bo]

@@zhelyo_physics would the frequency technically be higher in the first second after the force is applied as to a couple seconds after the force is taken off? Do we measure natural freq immediately after the force is taken off or do we wait a couple seconds ?

[@zhelyo_physics]

after the force is taken off the amplitude decreases but the time period remains constant (in most systems, if it's a pendulum only for small angles). I recommend checking this video out for a good understanding of resonance: kzbin.info/www/bejne/i3OueKaNmpl1o8k Good luck! : )

[@86rmb]

that voice change at 1:01 through me off

[@zhelyo_physics]

well, I guess my voice resonated : )

[@86rmb]

@@zhelyo_physics love your videos

[@user-rp6ls9vj4q]

Question: Why when increasing the frequency more than the natural frequency, amplitude decreases?

[@zhelyo_physics]

correct! Sometimes there are more resonant frequency later on but for A Level Physics if that's the course you are doing this is typically not required to know. Hope this is helpful!

[@mikebenstead7600]

Are there formulas to calcuate the natural frequency of various materials? (Glass, steel, copper, etc.) Presumably the variables would include diameter and length e.g. a copper bar 6 feet in length and 1" in diameter or a steel tube 3 feet in length with a 2" internal diameter

[@zhelyo_physics]

Excellent question! They are different in different situations. I discuss this a little bit more in depth here: kzbin.info/www/bejne/i3OueKaNmpl1o8k For a simple oscillating mass on a spring it is sqrt(k/m) but different in each situation. Typically it is simply measured for an object. Hope this helps!

[@moizahmed7130]

I've read that resonance occurs even if driving frequency isn't equal to the natural frequency. It is for the case when driving frequency is integral multiple of natural frequency. Why do u say about this sir??

[@zhelyo_physics]

So an object can typically vibrate in multiple "modes" of resonance. Totally true.

[@solapowsj25]

Joseph Fourier. 😊

[@abzhassan5475]

why does amplitude increase dramatically?

[@zhelyo_physics]

So this is beyond the syllabus but a SUPER interesting question, so I filmed the answer here: kzbin.info/www/bejne/i3OueKaNmpl1o8k Hope it helps!

[@mexxitamusic]

This guy is a mix between Ned Flanders and Captain America

[@zhelyo_physics]

haha I'll take that! : )

[@drbonesshow1]

If you tie this guy's arms down he probably won't be able to resonate his voice that is speak. Yes, some physics humor from a physics professor - I don't move my arms so much.

[@zhelyo_physics]

😂😂😂 Hi Professor! Funnily, someone else commented ages ago that I should be in the arm waving world champions. I'd take that.

[@drbonesshow1]

@@zhelyo_physics Far better to wave than salute. I could make some jokes about that, but I'll just wave hello and goodbye. BTW: I'm ambidextrous - therefore I can do some wave mixing - a little physics humor.

[@learnwithkowshik]

All confusions has gone.

[@zhelyo_physics]

Aim of this channel! : ) Thanks for the comment!

[@pitad2766]

why he kindaa

[@smithajose6119]

How to calculate a natural frequency of an object..

[@zhelyo_physics]

You have to measure it using an experiment, looking for the frequency at which the amplitude of vibration is max

[@smithajose6119]

@@zhelyo_physics can resonating frequency at any amblitude vibrates that object...

[@slayr6418]

does anyone else think this guy is kinda cute? lol