To sharpen the blade of a knife by rubbing
Question:

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) Class block

Solution:

(a) Stone will be more suitable because it will exert greater reaction and hence greater friction force which sharpen the blade of a knife easily by

rubbing.

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