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Ball bearings are kind of rolling elements that use small freely rotating metal balls which reduce friction . o
Design modification of different parts of machine to reduce friction Circular motion o
Motion in a circular path o Centripetal force plays a crucial role in circular motion . o
It is the Force that makes a body follow a curved path . It acts towards the centre . o o
Generally denoted by Fc
Fc = mv 2 / r
Sine we know that F = ma ; therefore v 2 / r is termed as Centripetal acceleration