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枫下家园 / 望子成龙 / 请教:a pilot is planning his flight to an airport which is 400 km southeast of his starting location. His plane flies at 250km/h but a wind of 20 km/ his blowing from the southwest. What heading should he choose for the plane?
-arknoah(Gege);
2020-5-20
(#12968826@0)
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我来试试这道题
-artemis(Artemis);
2020-5-20
{58}
(#12969522@0)
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这回一次答对,您太犀利了。
-payasyougo(allyoucaneat);
2020-5-20
(#12970478@0)
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多谢阅卷评审。我的信心又多了一点点。
-artemis(Artemis);
2020-5-21
(#12971027@0)
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您这水平,应该申请专门开个‘枫下解题’。老实说这里很多家长或者因为英语理解有障碍,或者就是当年被体育老师耽误了,很需要这类帮助。
-payasyougo(allyoucaneat);
2020-5-21
(#12971398@0)
+1
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"wind ... blowing from SW" means wind direction is from SW to NE, correct? :-)
-dingfeng88888(DDGG);
2020-5-21
(#12972145@0)
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对啊,我怎么觉得上面答案风向反了?
-drmf(1234);
2020-5-26
(#12983851@0)
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没有反,风向从SW到NE,速度20km/h,所以飞机需要一个反方向的速度抵消风速,需要一个从NE到SW的速度,以保持在SE轴线上飞行。否则就被风吹偏了。
-artemis(Artemis);
2020-5-26
(#12984012@0)
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原来这样。谢谢
-drmf(1234);
2020-5-28
(#12988487@0)