This is Not True ) M+ M6 D" ~! v/ b6 q& M(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 公仔箱論壇: l. D4 S3 `0 u1 o+ q0 X
effect is not significant. OK this explain the speed aspect. . U3 u" w+ t6 U7 Ftvb now,tvbnow,bttvb(b) Jumping direction: if you were in a car or a train carriage, you do not have a # K5 H' J6 Z+ g C5 b6 Cchoice 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 + T5 |. k6 M1 ^- ], k$ N8 {tvb now,tvbnow,bttvblanding impact. Do not forget to Roll when the body hit the ground.2 ~5 _% R" W& p. c+ A
(c) Make sure when you jump, you are facing the forward direction. If you are ' D/ J+ W+ Z6 M8 A N" m! [. z3 ~5.39.217.77:8898facing the away direction, the forward momentum will make you fall on the back + d/ D. B6 V; g* q公仔箱論壇of your head first, it could be a fatal hit.tvb now,tvbnow,bttvb! l& w. {/ d# J$ D# o
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" ' G; f/ s; F3 d9 S0 u% `' iTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。I doubt this is true.5.39.217.77:88981 w/ p* d: T/ ~: K. m
If you are carrying a forward momentum and when the body/ object landed, the : L2 y4 H3 J* C& }: gmomentum will continue its direction unless affect by other external force. (Baisctvb now,tvbnow,bttvb& C' ^1 l; X5 C
Newton Law) ie. The body will continue to move forward, your forehead will hit 3 Z! F8 {; i* r$ ]' y' D& W( K公仔箱論壇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
