Answers

2016-04-13T10:52:45+05:30
We know that greater the area of contact lesser will be the force created.And lesser the area greater would be the force.So the knife should have a smaller edge which can be attained by sharpening it,in order to cut or pass through any object with fewer force provided.
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  • Brainly User
2016-04-13T10:53:12+05:30
The edge of knife should be sharp because due to smaller area the pressure is small and the object can be cut easily
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