Q. 33.9( 7 Votes )

To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
A. stone

B. plastic block

C. wooden block

D. glass block

Answer :

To sharpen the blade of a knife, rubbing it against the surface of a stone will be the most suitable.


Friction increases when the surface is rough.


Stone has rough surface among all.


When you rub the knife against it, it will exert greater reaction.


As a result, the force of friction will increase and the knife will become sharper.

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