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CBSE Class 9 Answered

why is cutting edge of knife made sharper
Asked by | 11 Mar, 2008, 10:26: PM
answered-by-expert Expert Answer

A sharp knife cut objects better because due to its very thin edge, the force of our hand falls over a very small area of the object producing a large pressure and this large pressure cuts the object easily. While a blunt knife has a thicker edge. And due to this the force of our hand falls over a large area of the object and produces lesser presure. This lesser pressure cuts the object with difficulty.

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Answered by | 08 Dec, 2017, 02:41: PM

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