SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Smaller area provides more pressure for the applied force
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smaller area provides less pressure for the applied force.
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none of the above
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None of the above
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Detailed explanation-1: -The pressure exerted by the sharp knife edge is more than that exerted by the blunt one because the area on which force is exerted with a sharp knife is very small. Thus, it is easier to cut with the former than with the latter.
Detailed explanation-2: -The sharp end of a knife has very less surface area. We know that Pressure (P)=Area(A)Force(F). So, if the area is less then we can achieve a large pressure by applying some force. This large pressure will help us to cut the vegetables very easily.
Detailed explanation-3: -ANSWER: It is difficult to cut vegetables with a blunt knife because it has more area compared to a sharp knife, which means that the pressure exerted by the blunt knife is less than that of the sharp knife.
Detailed explanation-4: -Since the sharp edged knife makes lesser contact with the fruits to be cut, thus the pressure exerted by it on the fruit is very large. Because of this large pressure, fruits are easily cut with a sharp knife.