This is Not True& g3 l& X' f4 b' s& Q- }8 \
(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 1 q- S1 t& o9 Z" Q1 X
effect is not significant. OK this explain the speed aspect.tvb now,tvbnow,bttvb; K9 l8 P3 w$ C2 [3 y: q' Y# }
(b) Jumping direction: if you were in a car or a train carriage, you do not have a ! d1 W9 j! [) r" w6 Otvb 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4 B! ^# F# ]: o6 v
landing impact. Do not forget to Roll when the body hit the ground. , |, n& p+ @( R0 p/ ?: x3 F(c) Make sure when you jump, you are facing the forward direction. If you are 5 r% N3 Y$ p5 A" W0 L1 g( T4 h9 Ywww1.tvboxnow.comfacing the away direction, the forward momentum will make you fall on the back 7 v1 H( {# w% w9 hwww1.tvboxnow.comof your head first, it could be a fatal hit. 0 ]8 x1 ]6 k* o% oTVBNOW 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。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"tvb now,tvbnow,bttvb: }! z: g# a& L D
I doubt this is true. - P$ _$ C6 u: s d L5 V" W! x2 C公仔箱論壇If you are carrying a forward momentum and when the body/ object landed, the 6 }( T5 K) Q! [; I9 X" `+ ^- bTVBNOW 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。momentum will continue its direction unless affect by other external force. (BaiscTVBNOW 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。' R: Y; I4 y* t+ I! f/ c @+ U# P
Newton Law) ie. The body will continue to move forward, your forehead will hit tvb now,tvbnow,bttvb5 g$ l3 h. M t. o9 ^1 I6 I
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
