If I take a metal blade and try to cut a piece of paper, its easy to cut it. the reason is that the area of that blade is less so it applies more pressure, pressure = Force/Area. But if i take a sheet of paper and try doing the same with the corner of it, then why does it not cut things? It is thin and has low area and we are applying equal force with the paper. Whats the reason? Explain.
Answers
If I take a metal blade and try to cut a piece of paper, its easy to cut it. You are right the reason is that the area of that blade is less so it applies more pressure.
But when you take a sheet of paper and try doing the same with the corner of it, then it does not cut things.
There is one thing you need to consider: whether the instrument you are trying to cut with is strong enough to produce and withstand the pressure needed to cut the other material. For example, scissor is made up of steel and steel is very strong(rigid). It can withstand very high amount of pressure. That's why scissors and knives are made of steel. But paper is not strong. It can't withstand high pressure. If we force it to produce high pressure, then it will generally bend. But if you try to cut a substance which can be cut with small pressure (like jelly), we can cut it even with a paper.
Hope it clears your doubt.
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