Question

What is pressure and what are it's applications
Give full detail​

Answer 1

Answer:

Pressure, which is defined as the force over a given area, plays a number of important roles in daily life. It is a varied concept with various applications. In this chapter let us study about pressure and its application in detail.

Force, Pressure and Its Applications

Pressure is the force per unit area. The SI Unit of Pressure is the pascal (Pa). A pascal can be defined as a force of one newton applied over a surface area of one meter square. In other forms,

Pressure = Force / Area

The pressure is dependent on the area over which the force is acting, without any change in the force, the pressure can be increased and decreased. The Force applied to be constant if the surface becomes smaller the pressure increases and vice versa.

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.

By this we can conclude that the two factors that determine the magnitude of the pressure are:

Force: The force which states that the greater the force, the greater is the pressure and vice-versa.

Coverage Area: which states that the greater the area less is the pressure and vice-versa.

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Answer 2

Answer:

Pressure which is defined as the force over a given area plays an important role in everyday life.It is a varied concept with various applications.Pressure is the force per unit area.The SI unit of pressure is pascal(Pa).The pressure is dependent on the area over which the force is acting,without any change in the force,the pressure can be increased or decreased.The force applied to be constant if the surface becomes smaller the pressure increases and vice versa.

Explanation:

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