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प्रश्न
State two factors which directly affect the force of friction.
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उत्तर
Two factors which directly affect the force of friction are:
- The smoothness of the surface.
- The presence of solid, liquid, or gas around the moving body.
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संबंधित प्रश्न
Fill in the blank.
We use ball bearings to .................. the friction.
Name the two kinds of forces in nature.
Fill in the blank.
.................... is the SI unit of force.
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Tick the most appropriate answer.
Friction produces
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 short.
Define rolling friction and give an example where rolling. friction comes into play.
Answer the following in short.
List the various states of matter that offer frictional force?
Is there any possibility of making a special device to measure the magnitude of friction directly?
Assertion: There is a danger of a vehicle skidding on a wet road.
Reason: The tires of the vehicle lose their grip on the road due to an increase in friction due to the presence of water on the road.
