Bullet trajectory inverted
Why does a rifle bullet drop down in its flight and then return
upwards? A student tells me that the arc is concave down, not up.
So ---- the spent bullet goes zipping off into space?? :->
Unless you are talking about small fluctuations. I think this is a
question you should ask your student to prove (on paper, not by
bringing a rifle to school!).
gregory r bradburn
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Update: June 2012