Question

7. why is cutting edges of the knife made sharp
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Answer 1

Answer:

The cutting edges of the knife is made sharp to decrease the unit area to which the pressure is being applied to so that it cuts better than a blunt knife

Hope this answer helps... :)

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Answer 2

Answer:

the cutting edge of knife made share to increase pressure exerted to cut down the objects.

Explanation:

because as we know that, pressure is directly proportional to force and inversely proportional to the area in which force exerted.....

so if the area of knife decreases(sharpened) the pressure exerted also increases...and helps to cut down the objects easily....