Question

Why frequent sharpening of edges of knives required ?

Answer 1

Dear student, The pressure exerted due to a small surface area is high compared to pressure due to large surface area. This is derived from the equation, Pressure = Force/Area Which implies an equal force can exert higher pressure on a small area. This is why the cutting edges of tools like knives, blades etc are provided with sharp edges. The high pressure at the end of these sharp surfaces can easily pierce through wooden, plastic etc surfaces. Moreover due to wear and tear of knife edges the surface loses its sharpness. So to gain back sharpness frequent sharpening of the knife edges is required. Thanks and regards.