Class 11 Physics | Simple Harmonic Motion | #28 Energy Method to find Frequency of SHM | JEE & NEET

[@mohdshadab7338]

Very good explanation Sir👍👍👍. I am watching it after 9 years..

[@p.p.3589]

Sir we take zero reference at mean position or eqm position?

[@swethasrinivasan3248]

sir, What is the method to calculate the frequency of oscillation of a block connected to a multiple pulley - spring system

[@physicsgalaxyworld]

both the methods of restoring force and energy method are applicable... watch such cases in adv illustrations which we have used for multiple pulley systems...

[@monishaw3137]

Sir it is always applicaple??

[@alphaiitd1]

Thanks sir

[@mohaksharma7658]

Respected Sir,Since the block is moving up with velocity v, hence y is decreasing with time. So why dy/dt is not (-v) ?

[@physicsgalaxyworld]

+Mohak Sharma If you take dy/dt negative then as v is there in all terms of equation, you can multiply whole equation on the left by -ve sign... it remain same...

[@mohaksharma7658]

Thank u very much Sir. Really lucky to have u as my teacher..

[@vishalsinghal6719]

sir i dont understand what explanation u gave,if dy/dt is -ve then on multiplying full lhs by -ve then all terms change to -ve. plzz explain me criteria which i dont understand

[@vishalsinghal6719]

i think as dy/dt and velocity are in same direction so we take it as positive

[@vishalsinghal6719]

@@physicsgalaxyworld sir i dont understand the explanation u gave to mohak becoz. if dy/dt is -ve all terms change to positive or all can take sign -ve plzz teach me criteria that i dont understand ,I THINK as dy/dt are in same direction so we take it as +ve

[@tpsicmin]

Thanks

[@harshitsahu845]

Best pedalogy

[@raginigupta4440]

sir out of two method's which method should we apply I mean which method is best for shortness of solution

[@adarshchaturvedi3498]

energy one,. in most cases, not all...

[@anunaysharma2718]

Where have you covered damped oscillation?

[@physicsgalaxyworld]

kzbin.info/www/bejne/aXmvYqqHh5qEe9U

[@yashmagarwal2715]

@@physicsgalaxyworld only this much is there in jee for damped forced and resonance?

[@swastikstudy321]

how are u verified? with 96 subs

[@ayushmanmishra2714]

Sir can we differenciate it w.r.t. y as total energy is constant so its derivative will be zero and dv)^2/dy will directly give 2a.?

[@zyro9922]

differentiation of v^2 is just 2v. Why is it 2v dv/dt? At 6:54.

[@physicsgalaxyworld]

+Ali Hasan differentiation of v² is 2v when it is differentiated with respect to v but here we are differentiating wrt to 't'... if you are not clear with this, you need to follow all videos in sequence on topic 'Basics of Differentiation' on our website www.physicsgalaxy.com

[@zyro9922]

Thank you. I got it.

[@namangupta9021]

If more than 2 springs are attached via pulleys will this method work??

[@shrutikpatil7364]

Sir can we use work energy theorem?. I am getting the same result by work energy theorem.

[@itachu.]

yes you can... , and if one observes carefully , sir indirectly used the WET as you may get the same equation as KE(i) and PE(i) and spring potential (i) is zero and because of conventions final pe is negative... and nice observation i will remember this approach!

[@shrutikpatil7364]

@@itachu. Well, Thanks for the reply. I gave jee before three years. Tell moved too fast I feel. All the best!

[@itachu.]

@@shrutikpatil7364 oh haha i didn't realise it was three years ago , I hope you are going good with the flow even you are at the lowest point. thanks a lot for your good wishes :)

[@shrutikpatil7364]

@@itachu.Thanks mate. I'm currently pursuing chemical engineering from IIT Kharagpur. Thanks for your wishes!

[@adarshchaturvedi3498]

sir if we use the torque equations , if alpha = C@ , then we put -ve sign by ourselves and say that (w^2=c) .. but in energy method , the equation for shm will come with sign itself , ryt ?

[@woodwingsikar9480]

Sir at extreme postion velocity. Should be 0 then why we have taken v velocity Sir please tell

[@studdy4930]

it isnt extreme its a intermediate position

[@MohammadASIFNEETANDJEEPHYSICS]

sir xan u give some examples for energy methods i mean a collection of good questions

[@physicsgalaxyworld]

These are already taken in videos... watch the videos in sequence at www.physicsgalaxy.com or on our youtube channel playlist of the topic...

[@MohammadASIFNEETANDJEEPHYSICS]

yes i had gone through them but need more if possible with regards asif

[@s.kavinbalaji9324]

sir instead of this can i take the change in potential energy and since it is given that shm is executed we can compare the expression with 1/2ktheta^2 and get k thank u for this video sir verry helpful

[@physicsgalaxyworld]

Change in potential energy can be taken from the reference state but you cannot compare it directly as in initial state energy may or may not be zero...

[@s.kavinbalaji9324]

thanks sir!

[@yashujuneja7049]

Sir,Getting little confused!! As some of the topics in your playlist are not on mentioned in NEET syllabus.PLEASE GUIDE :)

[@ayu1323]

are all the videos of jee level or college level?

[@physicsgalaxyworld]

+ayu Pathak Yes all videos are covering JEE syllabus upto grade 12 physics but for JEE advance coverage you need to watch all advance illustrations videos at www.physicsgalaxy.com and attempt quegrid rank booster on www.quegrid.com

[@roneet9027]

thankl yoou sir

[@heckler73]

Fantastic... it seems like the Energy Method is similar to the Lagrangian method.

[@heckler73]

@Beat me Does it really matter?

[@heckler73]

@Beat me Well, I now work in a STEM field. So, my education paid off in that sense. Isaac Asimov's 'The Feeling of Power" is a fitting tale to describe how I now see my existence.

[@priyam6496]

God

[@9829manoj]

Is damped oscillations are in syllabus of jee or not?

[@shubhratsaxena7447]

No

[@illegalcall]

sir can u please teach the application of euler lagrange equation and its application in calculating time period

[@physicsgalaxyworld]

Not required for any competitive exam and upto high school physics level... this is covered in adv college physics lectures which we have not uploaded yet...

[@illegalcall]

when will u upload it sir??? Any rough time boundary

[@sushilv214]

instead of frequency , I DOUBT if we are discussing method to find angular velocity , omega !

[@physicsgalaxyworld]

Its one and same thing... if we calculate omega then frequency = omega/2 pi

[@sushilv214]

ohh .. yes it is thank you