Time?? It's quite different !!
Classical Mechanics
Level
4
A uniform circular disc of radius \(\displaystyle{\mathcal{R}}\) is placed on a frictionless horizontal plane.Another identical disc rotating with angular velocity \(\displaystyle{\omega}\) is gently placed on the top of it.The time taken to acquire the final angular velocity can be expressed as \[\dfrac{a}{b} \times \dfrac{\mathcal{R} \omega}{\mu g}\] Where \(\displaystyle{\mu}\) is the coefficient of friction between the plates. What is the value of \(\displaystyle{a+b}\)?
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by
Abhishek Singh