Moment of Inertia of a Disk with a Hole

[@JacksonDuncanDesigns]

Excellent, thank you so much

[@adityaarora5041]

A very helpful video thanx sir

[@aralozkarsli8939]

super cool !

[@ahmedshahzad5838]

well explained..

[@memecornernepal]

Thanks

[@eminfsert8298]

Now,Maybe i can pass my physics class,tnx

[@maniramsingh2202]

thanks sir thank you so much

[@vb8304]

thank you so much

[@mwu365]

5:10 the ^2 should be on the outside of the (4L) right

[@trippyat3524]

yeah

[@lolzomgz1337]

Why do I keep seeing the moment of inertia of a ring as "M(a^2 + b^2)" where and and be are the two radii. Shouldn't it be -, not +?

[@PhysicsNinja]

lolzomgz1337 you can use the method in this video to show that result. Be careful on the definitions of the masses. In the equation with a*a and b*b the mass is only the mass of the ring. Just be careful how you define the mass using the hole method and you will arrive to the same result

[@commenterdek3241]

Why does this not follow for an annular disk? It may be M(R2²-R1²)/2 according to concept of yours but comes out to be M(R2²+R1²)/2

[@PhysicsNinja]

It does work, remember you have to find the mass of the hole first. For the Annular disk the mass M is of the outer ring only. If you start with a full ring of mass M_total. I've worked this out before and it works. If you want a written 1 page solution just email me [e-mail] and i'll be happy to walk you through the steps.

[@PhysicsNinja]

This one is for you! ruclips.net/video/QFRu72yVxss/видео.html

[@krishnaverma8986]

Sooooooo lengthy