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प्रश्न
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 |
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उत्तर
| Column I | Column II | |
| a) | Static friction | objects are at rest |
| b) | Kinetic friction | objects are in motion |
| c) | Rolling friction | least friction |
| d) | Friction between the liquid layers | viscosity |
| e) | Sliding friction | objects are sliding |
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संबंधित प्रश्न
When a glass rod is rubbed with a piece of silk cloth the rod ______.
State two factors which directly affect the force of friction.
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Fill in the blank.
Rolling friction offers ............. resistance than sliding friction.
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
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Smoother the surface, ................. is the frictional force offered by it.
Answer the following in short.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
Why is a ball bearing used in a cycle hub?
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
