3i didnt get u bhiyya theres only 1 wall no....is it touchin the ground also??????
There is a solid cyllinder of radius R and length L of mass M and a charge Q uniformly distributed on the mass.
There is an electric field E along the -ve X axis. gravity acts downwards
The cyllinder is kept next to a wall. THe circular face is towards the ground. There is contact with the wall which parallel to the Y axis.
The cyllinder is rotating with a angular velocity ω
Find the time after which the cyllinder will come to rest. Also find the angular displacement.
Assume that the block has a fixed axis of rotation.
Coeff of friction on the horizontal floor is k
Coeff of friction on the wall is n
This is a question I just got in my mind while teaching today ;)
Not very difficult but checks your concept of rotational pretty well.
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12 Answers
62There is friction on both the walls :)
And it is different too..
Sorry take this as a correction
3
1why has he integrated for torque due to friction due to ground??
also wat will be the direction of friction due to ground??
62@iitimcoming..
I teach 2 guys here at our office..(which btw has a small classroom as well :)
It is now more of an informal relationship which started with something formal...
62@chinmay... he has to integrate it becasue the radius of the torque will be different at differne tpoints...
Direction will be such that it opposes the rotation (relative motion!)