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प्रश्न
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
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उत्तर
The nail becomes hot due to friction. Friction changes kinetic energy to heat.
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संबंधित प्रश्न
Give an example to illustrate the existence of the force of friction.
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
Answer the following in a word or two or in a sentence.
Which type of force acts on a string pulled from both ends?
Fill in the blank.
More the roughness of a surface, greater is the ........................
Tick the most appropriate answer
Friction always
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Fill in the blank
Rolling friction is ............. than sliding friction.
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
Fill in the blank.
Bicycles use ...................... to reduce friction between the pedals and the crank
Explain how friction can be minimized.
