How does a sharp object break through other objects without initial force(unlike, for example, bullets etc)
In: Technology
I think this may be a good analogy:
Imagine you have a big piece of square plywood and you go to a body of water.
First you lay down the plywood on the water “normally” and try to push it down as hard as you can. But it is really hard, because the surface area is very large.
Then you turn the plywood on the side and it goes below water very easy, because the surface area is very small.
When something has large surface area, you need a lot of force to penetrate and with small surface area, less force.
(and as others have mentioned, there are always some force involved in cutting)
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