Two horizontal disc of different radii are free to rotate about their central vertical axes. One is given some angular velocioty
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Two horizontal disc of different radii are free to rotate about their central vertical axes. One is given some angular velocioty , the other is stationery. Their rims are now brought in contact. There is friction between the rims . Then the other is stationery. Their rims are now brought in contact. There is friction [...]