A sharp-edge blade is more effective in cutting than a blunt blade due to__________________.

Choose the correct option.

• A sharp edge blade is easier to cut something as the pressure exerted by it is more than that of the pressure required to cut using a blunt blade. 
• This is because the area of contact is inversely proportional to pressure; the less the area, the more the pressure and vice versa.
• Pressure = $\frac{\mathrm{Force}}{\mathrm{Area}}$

Therefore, we can say a sharp-edge blade is more effective in cutting than a blunt blade due to the small contact area.