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The same force is applied to a sharp knife and a blunt knife. Which exerts greater pressure?
ADepends on temperature
BBlunt knife
CBoth equal
DSharp knife
Answer & Solution
Correct answer: A. Depends on temperature
1. Pressure = force / area.
2. A sharp knife has a much smaller contact area.
3. So the same force gives a much higher pressure.
4. Hence the sharp knife exerts greater pressure.
_Source: Selina Concise Physics ICSE Class 8, Ch 3 'Force and Pressure'_
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