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Grade: upto college level 

                        
A uniform disk of radius R and mass M is spinning with angular speed It is placed on a fiat horizontal surface; the coefficient of kinetic friction between disk and surface is (a) Find the frictional torque on the disk. (b) How long will it take for the disk to come to rest?
5 years ago

Answers : (1)

Navjyot Kalra
askIITians Faculty
654 Points 
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Also, the frictional force on the ring is:
232-968_1.PNG
232-717_1.PNG
Integrate the above expression,
232-537_1.PNG
232-696_1.PNG
5 years ago
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