NEET Physics Friction MCQ Question
Which of the following methods can effectively reduce kinetic friction in machines?
Using ball bearings between moving parts.
Increasing the contact area between surfaces.
Applying brakes to the moving parts.
Increasing the weight of the machine.
Correct Answer
Detailed Explanation
Ball bearings reduce kinetic friction by minimizing the area of contact and allowing rolling motion, as mentioned in the NCERT text.
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