Pressure has an important role in different work that we do in our daily life. When area decreases, pressure increases for the same force applied, making our tools more effective.
Smaller area = Higher pressure
The tip of an iron nail is made sharper to concentrate the applied force on a very small area. This creates extremely high pressure at the tip.
This high pressure allows the nail to pierce through hard materials like wood with relatively less force applied at the head.
Same force, smaller area = Easy penetration
Sharp plough shares made of iron are used to plough the field. The narrow, sharp edge cuts through soil efficiently.
More pressure is exerted even while applying less force due to the smaller contact area, making it easier to plough.
Sharp edge cuts through soil with minimal effort
One end of sickles and knives are made sharper to cut or chop wood and other materials easily.
The thin, sharp edge creates intense pressure that slices through objects. The sharper the blade, the less force needed to cut.
Razor-thin edge delivers maximum pressure