mamasing

This is Not True5.39.217.77: M. ]% l; p/ m  }) z
(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
0 f; ~  g! u9 m1 d" x# L( QTVBNOW 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。effect is not significant.  OK this explain the speed aspect.
. Y) @: @% G5 P/ E) b  Z5.39.217.77(b) Jumping direction: if you were in a car or a train carriage, you do not have a
+ x6 f) M+ K  L) _5.39.217.77choice 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
/ l8 x; [0 z+ O3 K! D9 r" W( Ftvb now,tvbnow,bttvblanding impact.  Do  not forget to Roll when the body hit the ground.
1 L6 \  q# u4 M1 x$ S4 V: ~(c) Make sure when you jump, you are facing the forward direction. If you are 5 l5 W# T* U4 i  A. q# Y
facing the away direction, the forward momentum will make you fall on the back
+ r: {  x, D& [of your head first, it could be a fatal hit.6 Y$ T9 V6 x" s! n
This is my 2 cents worth.

mamasing

"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"5.39.217.777 L9 y' _+ T$ C. l. @* m
I doubt this is true.公仔箱論壇* t5 g2 ^0 y' ^# x: \0 @) c7 O
If you are carrying a forward momentum and when the body/ object landed, the3 B8 x; C6 \: ~& \
momentum will continue its direction unless affect by other external force. (Baisctvb now,tvbnow,bttvb$ K$ k8 ]4 u( ^: Q- d
Newton Law) ie. The body will continue to move forward, your forehead will hit
2 {0 b/ I1 i" @' [tvb now,tvbnow,bttvbthe ground first unless you lean back when you jump off the moving object.