I mean I know that it’s a fact but why?
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Pressure is how much force you put on a given area. Let’s assume we use square centimeters.
If I put a dice (let’s assume the dice is perfectly one centimeter per side) on the floor and I step on it, my 75 kg of weight will give a pressure of 75kg/square centimeter, on that dice.
If I put more dices, let’s say 5rows of dices, 2 dices wide, and step on it, my weight will go on all the 10 dices, each dice will receive 7,5 kg of my weight, therefore it will receive a pressure of 7.5 kg/square cm.
You can “try at home”. Stepping on a singe dice is painful, because all the weight is concentrated in a little spot therefore that part of your foot gets a lot of pressure. And pressure is what hurts you in that case.
Extreme opposite example, you can lay down on a carpet of nails, uninjured, because you distribute the weight. the more you distribute, the less force for each nail, therefore less pressure each nail can do to hurt you. (Don’t try at home as nails are quite expensive, you need some thousand and it takes hours to build).
Pressure is a measure of how much force IS FOCUSED onto a given spot.
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