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
- Either a or b
- None of the above
Hint:
The flying of an airplane is an advantage of friction while wearing out a shoe is a disadvantage.
The correct answer is: Disadvantage
The column with disadvantages of friction are arranged correctly.
- The flying of an airplane is an advantage of friction while wearing out a shoe is a disadvantage.
- Friction causes wearing of moving parts in a machine and a decrease in the speed of the car- both are disadvantages of friction.
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