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Question:
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.



Replies:
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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