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प्रश्न
Define rolling friction
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उत्तर
The minimum force required to roll a body on a surface is called the force of rolling friction.
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संबंधित प्रश्न
Define static friction
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Answer the following in short.
Define force. Write its SI unit.
Fill in the blank.
The force of friction acting between two bodies in contact while at rest is known as ................ friction.
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
State if the following statement is true or false. Correct the statement if it is false.
Friction is offered by all the three states of matter.
A moving body comes to rest due to friction alone.
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: ______.
