- #1
Dayal Kumar
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Homework Statement
.A cylinder P of radius rP is being rotated at a constant angular velocity ωP along positive y-axis with the help of a motor about its axis that is fixed. Another cylinder Q of radius rQ free to rotate about its axis that is also fixed is touched with and pressed on P making an angle θ between their axes. Soon after the cylinders are pressed against each other, a steady state ls reached and the cylinder Q acquires a constant angular velocity. What can you conclude about the direction of frictional force when the steady state is reached?
Homework Equations
The Attempt at a Solution
I am getting that cylinder q will be rotating with a fixed angular velocity in the steady state and also it's centre of mass will be translating with ωQrQtanθ along the fixed axis of rotation. I am unable to understand why there will be frictional force if there is no acceleration or relative motion.