This is Not True ( J7 W- j7 R" x( I公仔箱論壇(a) Unless you are travelling in extremely slow speed (5Km or less), otherwise your jump off speed is so slow in comparison to your forward speed. The counter : d* \% ^; c- j1 t8 s9 ztvb now,tvbnow,bttvbeffect is not significant. OK this explain the speed aspect. " b1 \. {- j r3 g) ^2 S( gtvb now,tvbnow,bttvb(b) Jumping direction: if you were in a car or a train carriage, you do not have a 公仔箱論壇& ]. j- N% `: E% X( R& j5 M/ O
choice whether you are jumping forward or backward. You can only jump iside way or best a 45 degree against the forward angle. Either angle will affect your " p7 K' Y8 k: f- n4 L, r+ f7 d5.39.217.77landing impact. Do not forget to Roll when the body hit the ground.公仔箱論壇7 q9 g1 M- {9 Y' {- M2 o2 B
(c) Make sure when you jump, you are facing the forward direction. If you are 5.39.217.77/ l! w5 T5 b% z6 ^; p
facing the away direction, the forward momentum will make you fall on the back 6 q$ L& S0 K0 Q. d8 c. Y5 P2 K8 b
of your head first, it could be a fatal hit.# h0 p; l% Q: E
This is my 2 cents worth.作者: mamasing 時間: 2007-4-25 03:31 PM
"向前跳的話，著地的時候，身體會向後仰，後腦撞到的危機性較大，死亡率亦較高" & k# M6 V0 z2 n6 H1 L公仔箱論壇I doubt this is true.5.39.217.77# j, ]5 r1 w+ I5 g$ b5 x
If you are carrying a forward momentum and when the body/ object landed, the公仔箱論壇6 b, t$ E5 [% l7 _' Q9 J
momentum will continue its direction unless affect by other external force. (Baisc: X/ B4 F3 S5 Q9 A1 x1 N
Newton Law) ie. The body will continue to move forward, your forehead will hit 5 c& B1 A9 U9 e
the ground first unless you lean back when you jump off the moving object.作者: 光明的迷途 時間: 2007-4-25 09:03 PM
