Question

it is difficult to cut cloth using a pair of scissor with blunt blade

Answer 1

It is difficult to cut cloth using a pair of scissor with blunt blade because the impulse created by it is less i.e  force is acted upon a larger ares resulting in less pressure over that region whereas the scissor with sharp blade will create better impulse as it acts over a shorter area with more force hence It is easier to cut cloth using a pair of scissor with sharp blade

Answer 2

Blunt blades have larger area compared to sharp edge blades.Thus, the applied force produces a lower pressure