Bar to pound force per square inch (psi), psi to bar

When applying a specific force perpendicular to a flat horizontal surface of a stationary body, one cannot always be sure whether it will withstand it or be smashed. Walking on thin ice is extremely dangerous because the ice may not support the weight and could break, leading to potentially life-threatening situations. It is interesting that four halves of an eggshell can actually withstand a load of several kilograms. This showcases the incredible firmness of the eggshell structure. Another example is that a skier has the ability to glide freely on loose snow due to the distribution of their weight over a larger area. No doubt, a person in regular boots may sink into the snow up to their waist. Why is it? This is due to the concentrated force in a small area when wearing ordinary boots.

 

When the area of ​​contacting surfaces is large, a large number of molecules resist external influence. They move back a little, and the crystal lattice is compressed like a spring. In this case, the elastic force created by each element of the lattice is relatively tiny. However, since there are many of these forces, they are enough to compensate for the external influence. If the contact surface of the bodies is small, then far fewer molecules are attracted to "provide resistance." They have to "retreat" much further, but the elastic forces are still not enough to compensate for the external force, and then the material begins to collapse. If you need to convert using other units, please check the pressure units converter, calculator.