Quote:
Originally Posted by Xerxys
Why are the craters formed by the bullets impact curve "outwards"? i.e. The surface that is hit, the entry surface, has a hole, that looks as if the bullet exited instead of entered.
How come?
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For the same reason that craters on the moon have a raised lip. The impact creates high pressure in the substrate, and the material flows away from the high pressure region the easiest way it can. If the metal goes forwards or sideways, it encounters more metal, but it only has to push against air if it goes backwards.