17. Advance Illustration | Rigid Body Dynamics | Moment of Inertia of a Hemisphere | by Ashish Arora

The website, aimed at nurturing grasping power students, has classroom lectures on almost all the topics. It is an outcome of 23-year long toil of Physics expert who has made it a mission to simplify the complexities of Physics.

Ashish Arora, the brain behind this interactive unique website, has all his lectures available on web for free of cost. He has created a youtube channel in the name of Physics Galaxy. Today more than 6000 video lectures are being watched per day on this website which is highest among any other e-learning website in India. Till now more than 3.6 Million videos are watched on it. On each video subtitles are also available in 67 languages using google translator including English, Hindi, Chinese, French, Marathi, Bangla, Urdu and other regional and international languages.

Besides uploading transcripts of all his videos, he has created a software based synchronized European voice accent of all videos to benefit students in USA, Europe and other countries.

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[anmolempire]

Hint: Axis passing through Centre & Centre of mass of body is altogether is different things..

Also if Body is cut into n-indentical pieces than MOI of each remain same

[abdullabohra-jm]

here again a twist can be added by varying density in terms of distance from center through which aspirants will have to first calculate com of the sphere only then they will be able to use parallel axis theorem thanks sir

[shubhambhagat]

Respected sir, a small doubt. why are we finding Inertia of Com first and then using parallel axis theorem? Why not directly add I1+ MR^2?
Are we always supposed to take the COM Inertia for calculation?

[udaykishorepandey]

Respected sir here first we can take an acis passing through its base then we can assume a strip of thickness Rdtheta and radius RSI theta at a distance of rcostheta from base then we can integrate after that using parallel axis theorem we can obtain the result but I didn't get answer Plz Explain

[MohammadASIFNEETANDJEEPHYSICS]

Sir why this question is not in advanced level of problems has it been removed or anything wrong

[deepakchandravanshi]

A uniform hollow hemisphere of mass m and radius r is released from rest on a smooth horizontal surface with its open face vertically initially. Maximum normal reaction between hemisphere and ground during motion plz hint me about this....plz

[animalover]

How we got that distance 3R/8 of COM?? 🙄🙄

[MohammadASIFNEETANDJEEPHYSICS]

thank u sir and one small request can keep some good assignments with detailed solution so for important topics

[MohammadASIFNEETANDJEEPHYSICS]

and Sir don't mind but please change of the script of physics galaxy book it is not ease to read content is awesome but the way it is represented is not ok please otherwise it is excellent please sir with regards asif

[atharavkarhad]

Sir how do we know that MI of hemisphere is same as that of sphere ?

[satishkumdale]

Respected sir, is this hemisphere solid or hollow ?

[dr.vinitajain]

sir while solving the illustrations is it ok if we write the equations and match them with your equations or should we solve till the last step and then match?

[subhradeepkarmakar]

Sir can we do it by integration method?