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प्रश्न
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
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उत्तर
Knot in a thread : increase friction : : Ball bearing : reduces friction
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संबंधित प्रश्न
Friction depends on the ______ of surfaces.
Select the correct alternative.
Friction is reduced by
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Smoother the surface, ................. is the frictional force offered by it.
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Friction depends upon the ............... of an object.
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List the various states of matter that offer frictional force?
Match the following.
| Column I | Column II | |
| a) | Static friction | Viscosity |
| b) | Kinetic friction | Least friction |
| c) | Rolling friction | Objects are in motion |
| d) | Friction between the liquid layers | Objects are sliding |
| e) | Sliding friction | Objects are at rest |
