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Ball bearings is a device which consists of a ring of small metal balls

It reduces friction between the surfaces its rolling on

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  1. Class 8
  2. Chapter 12 Class 8 - Friction

About the Author

CA Maninder Singh's photo - Expert in Practical Accounts, Taxation and Efiling
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 9 years and a teacher from the past 16 years. He teaches Spoken English, Written English, Grammar and Vocabulary at Englishtan.