This is Not True公仔箱論壇7 P8 R$ I8 o& u9 a$ T8 G
(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 TVBNOW 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。0 m, t9 m- A& \2 }( z6 E
effect is not significant. OK this explain the speed aspect.$ L/ l3 \8 [" G6 F" D
(b) Jumping direction: if you were in a car or a train carriage, you do not have a 6 F% _ I- V, W2 A( dtvb now,tvbnow,bttvbchoice 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 公仔箱論壇+ @( p; _+ E; z- J+ w# s0 y
landing impact. Do not forget to Roll when the body hit the ground. ! w7 Z, S& R# m公仔箱論壇(c) Make sure when you jump, you are facing the forward direction. If you are 6 R3 F1 {9 W* Y' t
facing the away direction, the forward momentum will make you fall on the back ; P+ M% a, \# {0 v. c# G S
of your head first, it could be a fatal hit.1 M5 v& q" M; l& F$ Q
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" ; e" ?& J3 l* _% k JI doubt this is true.9 ?7 J( v! P1 e( j0 t
If you are carrying a forward momentum and when the body/ object landed, the公仔箱論壇" V+ Z& j1 a* q& |1 Q. F
momentum will continue its direction unless affect by other external force. (Baisc C/ }" ]9 U6 n: ?1 S# N& o公仔箱論壇Newton Law) ie. The body will continue to move forward, your forehead will hit : x( q8 F! q0 m! k/ sTVBNOW 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。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
