APPLICATION INVOLVING HIGH PRESSURE
- Increasing the pressure by reducing the area
- A sharp knife has a very small surface area on its cutting edge so that high pressure can be exerted
- The studs on a football boot have only a small area of contact with the ground. The pressure under the studs is high enough for them to sink into the ground, which gives extra grip.
APPLICATION INVOLVING LOW PRESSURE
- Reducing the pressure by increasing the area
- Skis have a large area to reduce the pressure on the snow so that they do not sink in too far.
- A tractor moving on soft ground has wide tires to reduce the pressure on the ground so that they will not sink into the ground
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