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प्रश्न
Give three examples to illustrate that friction is a necessary evil.
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उत्तर
The examples to illustrate that friction is a necessary evil are:
- If friction were absent, we would not be able to walk.
- Friction is necessary to burn a matchstick.
- It is due to friction that we can write on board by chalk.
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संबंधित प्रश्न
Fill in the blank.
.................... is the SI unit of force.
Fill in the blank.
The force of friction acting between two bodies in contact while at rest is known as ................ friction.
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
Tick the most appropriate answer.
Friction is offered by
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.
State if the following statement is true or false. Correct the statement if it is false.
Friction has no relation with our walking or running.
Answer the following in short.
List the various states of matter that offer frictional force?
Why is a ball bearing used in a cycle hub?
Is there any possibility of making a special device to measure the magnitude of friction directly?
