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Class 8
Chapter 12 Class 8 - Friction

ball-bearings.jpg

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

It reduces friction between the surfaces its rolling on

 

It works like

How a ball bearing works

 

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CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo