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प्रश्न
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
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उत्तर
Due to frictional force acting on it which resists/opposes the motion of the object.
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संबंधित प्रश्न
Write true or false.
The sliding friction is more than the rolling friction.
Fill in the blank.
We use ball bearings to .................. the friction.
Give an example to illustrate the existence of the force of friction.
Fill in the blank
Rolling friction is ............. than sliding friction.
Fill in the blank.
Rolling friction is ........... than sliding friction.
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?
Answer the following in a word or two or in a sentence.
Name a method used to reduce friction.
Answer the following in detail.
Define friction and explain how it is useful to us.
Friction depends on the ______ of two surfaces in contact.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
