Pressure is defined as force per unit area (on which the force is acting).

or, pressure = force/area

Force is the product of mass and acceleration of an object, as per Newton's second law of motion and has the units of Newton (N). Thus, the units of pressure are Newton per square meter (`N/m^2` ). Another commonly used unit for pressure are psi or pound per square inch.

Also, Pressure = (mass x acceleration)/ area

The pressure exerted by the air is measured in terms of atmosphere or atm. 1 atm is equivalent to the pressure exerted by a column of mercury 76 cm or 760 mm high.

One interesting aspect of the relationship between force and pressure is that as the area reduces, pressure rises for the same applied force. For example, it is impossible for a person to move a wall by exerting force on it. But if we apply the same force on a brick, we can easily move it. If we apply the same force on the tip of needle, think about how much more pressure is developed and what it can accomplish.

Hope this helps.

**What is the difference between force and pressure?**

The way I would explain it is that the two are closely related but that pressure depends on how much of an area the force is being exerted upon.

To find force, you have to know the mass of the object and its acceleration. Once you know that, you have the force because Force = mass times acceleration.

To convert force into pressure, you have to know how much of an area the force is acting upon. Stated mathematically, P = F/A where P is the pressure, F is the force, and A is the area.

So the identical amount of force exerts a lot of pressure on a small area or a little pressure on a large area. This is why you wouldn't want to sit on one nail but you could lie on a bed of nails.

**What is relation between force and pressure?**

**Pressure is defined as the amount of force acting on a given area. Thus, the mathematical equation of pressure is force divided by area. This equation can be rearranged to solve for force. When done so, force equals pressure times area. **

Pressure is caused by the collision of particles with a surface. Although they cannot be seen with the unaided eye, there are gas particles surrounding us. These particles are in constant motion. The particles collide with one another and other surfaces. The more that a surface is bombarded by particles, the greater the pressure.

Pressure often increases as temperature increases. Temperature is a measurement of the average kinetic energy obtained by the particles that make up a substance. Kinetic energy is the energy of motion. Thus, an increase in the temperature of a substance implies that the average kinetic energy of the particles of the substance has increased. As the kinetic energy of the particles increases, the particles begin to move faster and more often. Thus, as temperature increases, the particle bombard surfaces more often and pressure increases also.

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