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प्रश्न
Tick the most appropriate answer.
Force of friction comes into play when a/an
विकल्प
object attempts motion
moving object tries to stop
object is at rest
all of the these
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उत्तर
all of the these
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संबंधित प्रश्न
When a glass rod is rubbed with a piece of silk cloth the rod ______.
Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Define sliding friction
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More the roughness of a surface, greater is the ........................
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The force of friction acting between two bodies in contact while at rest is known as ................ friction.
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Smoother the surface, ................. is the frictional force offered by it.
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Friction depends upon the ............... of an object.
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Explain how friction can be minimized.
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.
