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प्रश्न
Answer the following in a word or two or in a sentence.
Why is difficult for a pen to leave a mark on a highly smooth plastic sheet?
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उत्तर
Because the smooth surface has very less friction.
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संबंधित प्रश्न
Friction depends on the ______ of surfaces.
Write true or false.
The sliding friction is more than the rolling friction.
The eraser gets smaller and smaller as you use it more and more. Explain the reason.
List three ways of reducing friction.
Answer the following in short.
Define force. Write its SI unit.
Answer the following in short.
What do you understand by normal force?
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.
