This is Not True; }- K% I( t0 m: @7 a/ a
(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 + [) |) E; Z$ _6 G( m; }# ^' E: Seffect is not significant. OK this explain the speed aspect.www1.tvboxnow.com2 w" y; K3 G, a6 @
(b) Jumping direction: if you were in a car or a train carriage, you do not have a + I: T# ?# c3 A1 V2 E. ^
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 7 [6 j7 }$ k0 u) ^" M公仔箱論壇landing impact. Do not forget to Roll when the body hit the ground. / F2 H* `* O2 y- { M(c) Make sure when you jump, you are facing the forward direction. If you are 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。1 y8 S/ X4 j1 l6 O+ ?
facing the away direction, the forward momentum will make you fall on the back % m0 }3 z% L% K
of your head first, it could be a fatal hit.0 r3 z8 T. ]" }
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" . v; m0 o# @' O- s2 VI doubt this is true. 1 C" k- }; M9 F4 n4 }) |) _www1.tvboxnow.comIf you are carrying a forward momentum and when the body/ object landed, the 1 _4 W% q! ?1 D L: }5 O Zwww1.tvboxnow.commomentum will continue its direction unless affect by other external force. (Baisc公仔箱論壇1 C8 {: x$ O5 [. m J9 Q! j, K
Newton Law) ie. The body will continue to move forward, your forehead will hit 公仔箱論壇. Y3 b; }5 k6 S
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
