This is Not TrueTVBNOW 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。" }8 Z3 |* x o4 ?5 o6 P
(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 . M( o% I' @+ Ueffect is not significant. OK this explain the speed aspect.公仔箱論壇 S2 _ x! M% h. m& H! q7 w. Q
(b) Jumping direction: if you were in a car or a train carriage, you do not have a - N4 ]& z' B+ ]' achoice 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 ; }# g! s" R" L& w1 F8 v& W9 j; h$ Llanding impact. Do not forget to Roll when the body hit the ground. / ^ G" b6 T" |% w4 ltvb now,tvbnow,bttvb(c) Make sure when you jump, you are facing the forward direction. If you are 6 |* [$ Y* n# R! J9 @$ S* A4 q
facing the away direction, the forward momentum will make you fall on the back 5 e( [4 c' c# N1 ?of your head first, it could be a fatal hit. % M. C1 n" t/ `6 k( E7 etvb now,tvbnow,bttvbThis 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"9 i5 \4 V! u5 ~; E; ^. I( L2 h9 n3 Z
I doubt this is true. 2 o0 ]0 n/ u. X6 S7 H( yIf you are carrying a forward momentum and when the body/ object landed, the 4 O3 s0 ?/ q( Umomentum will continue its direction unless affect by other external force. (Baisc # {5 P; ~& u# Y% A公仔箱論壇Newton Law) ie. The body will continue to move forward, your forehead will hit 8 t1 O" g# `6 j" D3 Y; [* Xthe 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
