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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
Give examples to show that friction is both a friend and a foe.
Give an example to illustrate the existence of the force of friction.
Define sliding friction
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
State if the following statement is true or false. Correct the statement if it is false.
If two forces acting in opposite directions on a body arc of equal magnitude, then the body will not move.
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.
Smoother the surface, ................. is the frictional force offered by it.
Why is a ball bearing used in a cycle hub?
Explain how friction can be minimized.
