Posted by VADAVE on November 23, 2014 at 05:37:07 from (68.100.103.133):
In Reply to: OT--Physics Question posted by Jiles on November 22, 2014 at 18:41:03:
The concern about the exact wording of the question is a real concern. However if the question is as described then the stated answer is wrong--45 degrees is correct. It's all about getting the maximum range. Straight up travels 0 distance or however much the wind blows it off course. horizontal and 45 degrees brings in a discussion of gravity. Gravity is a constant Force which is acting all the time and as soon as the round leaves the barrel begins to pull it to earth. When it reaches the earth forward travel is over, in this question. To counteract the pull of gravity 45 degrees maximizes the forward travel. BTW that is also the way every physics textbook will answer the question--45 degrees.
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