मशीनों में तथा साइकिल में धुरी तथा नाभि के बीच बाल बेयरिंग का प्रयोग किस प्रकार के घर्षण का उदाहरण है?
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Answer:रोलिंग घर्षण
Explanation:
In rolling friction, the ball bearing has numerous small balls filled inside races of annular bearing socket construction having sufficient lubricant filled inside; and the central axle does not rotate while outer annulus / ring rotates. The relative movement is ensured by the ball bearings in which the balls rotate alongside the moving outer annulus / ring.
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