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High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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No Question is difficult if it is analyzed carefully .. After learning sequenced theories, Such questions are really boosting my confidence sir.. Thanks a million for such quality content respected sir!

3 years ago by

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sir, the force due to friction acts on every point on the elemental ring and not just on one point.....so shouldn't we take a complete integral of friction acting on every point on the ring rather than that on one point only.?

6 years ago by Rishabh Chaurasia

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sir what about the torque due to the rotation of disk?

8 years ago by gaurav sahu

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If w final(omega is zero) then w initial = -alpha*t which gives t as negative..but this can happen...please explain..

8 years ago by Ritwik Jha

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i mean w final(omega) is zero..

8 years ago by Ritwik Jha

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here we have taken acceleration to be retardation which is a=(-ve)value used so time will be +ve

8 years ago by Sangita Kumari

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sir why did we use integration while calculating friction ,as friction is independent of area in contact morever we didnt use integration to calculate friction in translational motion

9 years ago by vishal

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Here we are not integrating friction... we have to calculate the torque due to friction which is acting at different radii so to calculate the total torque of friction we need to integrate the torque due to friction at an elemental ring and we integrate as at different elements of disc torque due to friction is different..

9 years ago by Physics Galaxy

Ans 2 ->

thanks a lot sir I have got your point

9 years ago by vishal

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Video Lectures

High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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