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Questions and Answers
What method is used to reduce friction by sprinkling boric acid powder on a carrom board?
What method is used to reduce friction by sprinkling boric acid powder on a carrom board?
- Making the surface smooth (correct)
- Increasing roughness of the surface
- Creating irregularities on the surface
- Introducing more friction
How does polishing help in reducing friction between two objects?
How does polishing help in reducing friction between two objects?
- Decreases friction by evening out irregularities (correct)
- Creates more irregularities on the surfaces
- Intensifies friction by making surfaces stickier
- Increases friction by adding roughness
What is the purpose of using ball bearings in reducing friction in machines?
What is the purpose of using ball bearings in reducing friction in machines?
- To maintain the nature of motion as sliding
- To increase roughness between surfaces
- To reduce friction by changing motion from sliding to rolling (correct)
- To increase sliding friction
Why are ball bearings and rollers effective in reducing friction?
Why are ball bearings and rollers effective in reducing friction?
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In reducing friction, what effect does powder have when sprinkled on a surface?
In reducing friction, what effect does powder have when sprinkled on a surface?
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Study Notes
Friction Reduction Methods
- Sprinkling boric acid powder on a carrom board reduces friction by providing a smooth, lubricating surface for the pieces to move on.
- Polishing two objects in contact helps reduce friction by removing surface roughness and allowing them to slide smoothly against each other.
- Ball bearings are used in machines to reduce friction by providing a smooth, rolling motion instead of sliding friction.
- Ball bearings and rollers are effective in reducing friction because they minimize the contact area and allow for easy rolling motion, reducing the force required to move objects.
- Powders, such as boric acid, sprinkled on a surface reduce friction by providing a layer of lubrication, allowing objects to move smoothly with less resistance.
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Description
Explore the various ways to reduce friction in this quiz, from sprinkling powder on surfaces to using ball bearings in machines. Learn how polishing and other methods help to minimize friction between objects.
