Rotational Mechanics | Pathfinder Solutions | Annular Disc Mounted on Fixed Cylinder

[@shreyanshtiwari990]

Thank You Sirji🙏

[@paragdey2721]

Nice

[@rockygiri1478]

Thank you sir for your efforts 🙏 👏

[@subhashpatel5861]

Nice question sir.,,, I made correct fbd till 1st case but I couldn't guess the shift of N due to heavier mass.,, ✌✌👌👌

[@naruto7409]

Sir why is there rotational equilibrium for disc?

[@BUNNY-gb6uj]

Massless disc!

[@iitjeeaspirant1595]

Sir, why is the contact point not the entire thread on the wheel, and is only one point?

[@sarthakmahale1802]

Thank you sir

[@soumyadippramanik847]

Sir why rotational equilibrium established there....there should be some angular acceleration ....

[@laptop1113]

as the dis is asslesss

[@lakshyasharma8519]

Sir u can compile your advance illustration in a book/ebook it would be very beneficial for us. I personally did lot of rough work and not able to extract complete concepts from my handwritten Pathfinder solñ

[@Raj-ig3wi]

Sir if pulley is massless then value of tension on both sides of pulley should be same?

[@zed.6128]

No, vo tab hota agar friction between cylinder and disc nahi hota .

[@mamtamittal3051]

See if the pulley is massless then the disc has no moment inertia which means that tension should be equal on both sides becuase now the net torque should come out 0 but here there iis friction hence net torque with friction should come out 0. Its likeMoment of inertia is 0 doesnt mean that body cannot have angular accelration e, it only means that the torque is 0

[@mateen8793]

It doesn't matter whether disc is massless or not as linear acceleration of disc is zero.

[@ishanporwal4403]

Friction is the only force which making the disc rotate.....toh friction force right me lagega na

[@zed.6128]

Jo force disc ko rotate kar raha hai vo friction between string and disc hai naki friction between cylinder and disc.

[@arianislam7636]

Sir has taken net torque zero so there is no rotation. Friction is stopping the rotation. The thread is sliding on the non rotating pulley

[@earningguru4739]

Bro is this series better or Ashish Arora advanced illustrations???

[@iitjeeaspirant1595]

@@earningguru4739 Definitely better, Ashish sir's checklist has some easy questions but even in the tougher ones's concept is not explained. These questions are challenging and also clear your concepts!

[@ashokarichwal4250]

Sir pls explain why we assume that pulley is mass less?

[@PhysicswithAkashGoyal]

This information is missing in the question and answer is given according to massless pulley

[@pranavmaiya4386]

please dont join unacademy

[@Ramesh-ey8fe]

thank you sir

[@lakshitasharma4709]

thank you sir

[@sunilbairwa6352]

welcome beta