Physics
Grade-9
Easy
Question
In which of the column are the activities categorized correctly according to the advantages and disadvantages of the role of friction in them?

- Advantage
- Disadvantage
- Both
- None of them
Hint:
Walking and flying of airplanes are possible because of friction which are the advantages.
The correct answer is: Advantage
The column with advantages of friction is categorized correctly.
- The activities like walking on a surface and flying of an airplane are made possible by friction.
- These are categorized under the advantages of friction.
- Writing on a blackboard is an advantage while wearing out of the shoes is a disadvantage of friction.
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