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प्रश्न
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
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उत्तर
Static friction > Sliding friction > Rolling friction.
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संबंधित प्रश्न
Define rolling friction
Fill in the blank.
More the roughness of a surface, greater is the ........................
Fill in the blank
Rolling friction is ............. than sliding friction.
Fill in the blank.
Rolling friction is ........... than sliding friction.
Fill in the blank.
Bicycles use ...................... to reduce friction between the pedals and the crank
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
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 |
Explain how friction can be minimized.
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
