作者degraded (事與願違的遺憾)
看板TransPhys
標題[力學] 請問 一題halliday 8th的問題
時間Fri Oct 19 20:45:42 2007
Calculate the ratio of the drag force on a jet flying at 963 km/h
at an altitude of 8.4 km to the drag force on a prop-driven transport
flying at half that speed and altitude.
The density of air is 0.47 kg/m3 at 8.4 km and 0.72 kg/m3 at 4.2 km.
Assume that the airplanes have the same effective cross-sectional area
and drag coefficient C.
想請問這一題的題目在問什麼
然後怎麼算??
因為本身普物還沒教到drag force
然後有同學要問這題
想請求板上高手的幫忙
謝謝!!
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※ degraded:轉錄至看板 Physics 10/19 21:27
1F：推 brahmsliu:基本上....前面一有一張是教drag force的 10/20 22:39
2F：→ panpan19:能看到這題應該就教過了~查查老師的投影片應該是有=.= 10/25 17:35