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प्रश्न
Fill in the blank.
More the roughness of a surface, greater is the ........................
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उत्तर
More the roughness of a surface, greater is the friction.
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संबंधित प्रश्न
A charged glass rod attracts a charged plastic straw.
List three ways of reducing friction.
State if the following statement is true or false. Correct the statement if it is false.
Like charges always attract each other.
Fill in the blank.
Weight remaining the same, friction is independent of ............. of surface in contact.
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank.
Rolling friction is ........... than sliding friction.
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
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 |
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
