How does a sharp object break through other objects without initial force(unlike, for example, bullets etc)
In: Technology
Who says there’s no intial force? You *do* excert some force against the object you’re cutting, it’s just a lot less. The reason is that to cut something you need pressure, which is proportional to both force and applied area. So the sharper the knife the smaller the cutting edge area is, and the less force is needed to cut.
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