2012 · Q24
It is difficult to cut things with a blunt knife because
General KnowledgePhysics
- AThe pressure exerted by knife for a given force increases with increase in bluntness
- BA sharp edge decreases the pressure exerted by knife for a given force
- CA blunt knife decreases the pressure for a given force
- DA blunt knife decreases the area of intersection
Explanation
Pressure = force/area; a blunt (larger-area) edge exerts less pressure for the same force (key: C).