ICSE Class 8 Answered
Knives are grounded to a thin edge to :
a) decrease the pressure
b) increase
c) decrease the area
d) both (b) and (c)
Asked by visheshagarwal153 | 26 Aug, 2019, 08:45: PM
Expert Answer
Pressure is given by Force / Area.
The blunt knife has larger surface area and it becomes difficult to cut. On sharpening the knife the surface area of the edge of knife decreases as a result the force acts on comparatively smaller surface area and generates huge presssure.
Answered by Utkarsh Lokhande | 27 Aug, 2019, 09:31: AM
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