The Speed and Angle of an Arrow Shot from a Longbow
- Learn how to estimate the speed and angle at which an arrow must leave a longbow to reach a target 100 meters away, given a maximum altitude of 20 meters and neglecting air resistance.
- Plot the required release speed and angle as a function of the arrow's maximum altitude while traveling to the target.
- Discover the accuracy and range of longbow arrows, which can reach targets up to 100 meters or more.
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この問題の解き方を教えてください。
The longbow are acurate at ranges to 100 meters or more. If the maximum altitude of an arrow is less than h = 20m while travelling to a target 100 m away from the archer, and neglecting air resistance, esitimate the speed and angle at which the arrow must leave the bow. plot the required release speed and angle as a function of height h
- primula2
- お礼率40% (14/35)
- 物理学
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質問者が選んだベストアンサー
矢の水平方向の運動エネルギーはへんかなしですね。 ＞ 垂直方向の運動エネルギーは、２０ｍ上空で０になります。 これで矢を放つときの垂直方向の運動エネルギーは決定されます。 ＞ 最初の垂直方向の運動エネルギーから速度も求まります。 ただし、矢の質量が記されていませんので、仮に１ｋｇとします。 ＞ 初速度が求まれば、２０ｍ上空まで達する時間も求まります。 その間に水平方向に５０ｍ進むわけです。
その他の回答 (2)
- mystery200
- ベストアンサー率41% (5/12)
＞plot the required release speed and angle as a function of height h 英文を正確に読むと、ｈ＝２０ｍで解くわけでないようです。 初期スピードと角度をｈの関数で表現するようです。 でも、できているようです。
- okormazd
- ベストアンサー率50% (1224/2412)
acurate→accurate ? esitimate→estimate ? plot→Plot ? height h→height h. ? 英文の意味は解るのですか。
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補足
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