Science, asked by shahkashish394, 2 months ago

a hallow circular device containing small metal balls

Answers

Answered by ItzTwinklingStar

Answer:

ball bearings

Ball-bearing is a hollow, circular device containing small metal balls. It is fitted around the moving part of Machines, search as an axle. The ball-bearing reduces friction by converting sliding friction into rolling friction therefore ball bearings are used in machines.

Answered by Anonymous

Answer:

ball bearings

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