what is the advantage of pressure ? give three examples
Answers
Answer:
Explanation:
5 applications of pressure are-
- 1 Air pressure in car tire supports the weight of the car
- 2 Sucking a drink through a straw - fluid flows because of pressure difference.
- 3 Aircraft fly because of the air pressure on the wings.
- 4 Bullet fired from a gun is driven by gas pressure
- 5 Toy balloon inflates because of air pressure inside
Let us take an example of pressure: take into consideration a sharp needle, it has a small surface area. However, consider a pencil which is very blunt in the back. It has more surface area than the needle. If we poke the needle in our palm, it will definitely hurt us as the needle gets pierced inside our skin whereas if we poke the blunt side of the pencil into our hand it wouldn’t pain at all.
It is due to the fact that the area of contact between the palm and the needle is very small, further the pressure is in a way large. However, the area of contact between the pencil and the palm is more, therefore the pressure is less.
Another example we can take as – A brick sitting on a surface exerts a force equal to its weight on the object it is resting on. Now we know that a rectangular brick has a wide surface and thin surfaces on the sides. By changing the orientation of the brick resting on a surface, we are effectively changing the pressure acting on the surface by the same brick.
Answer:
- it saves time .
- it makes us focus .
- preservers our interest .
- this are the three advantages of pressure .