Ball bearings reduce friction by converting:

Practice MCQ for SSC, UPSC, RRB Exams

A. Sliding friction into rolling friction A.
B. Rolling friction into sliding friction B.
C. Static friction into kinetic friction C.
D. Kinetic friction into static friction D.

Correct Answer: A সঠিক উত্তর: A

Explanation ব্যাখ্যা

Ball bearings reduce friction by converting A) sliding friction into rolling friction.
Ball bearings work by placing small, round balls between two surfaces that would normally slide against each other. This allows the surfaces to roll instead of slide, significantly reducing friction. Rolling friction is much less than sliding friction, meaning less energy is lost when a machine uses ball bearings.

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