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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
Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.
Give examples to show that friction is both a friend and a foe.
When a glass rod is rubbed with a piece of silk cloth the rod ______.
What is the cause of friction?
List three ways of reducing friction.
Define sliding friction
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
Tick the most appropriate answer.
Force of friction comes into play when a/an
Tick the most appropriate answer.
Friction produces
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.
