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प्रश्न
Give an example to illustrate the existence of the force of friction.
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उत्तर
If we stop paddling our bicycle, it gradually slows down and ultimately it stops after traveling a certain distance. This is due to the frictional force between bicycle and ground.
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संबंधित प्रश्न
What is the cause of friction?
Name the three kinds of friction.
Fill in the blank.
.................... is the SI unit of force.
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Tick the most appropriate answer.
Friction produces
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank.
Bicycles use ...................... to reduce friction between the pedals and the crank
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 |
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
