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。5 J0 g9 w: ~: W2 ~4 v
(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 ; @* w* L3 `$ E! i" d4 ^" ~公仔箱論壇effect is not significant. OK this explain the speed aspect.$ A/ y1 D4 t2 J/ j6 `
(b) Jumping direction: if you were in a car or a train carriage, you do not have a 4 j0 z* S7 @4 \! D/ S1 i) I x
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 5 X2 D Y/ y6 ~& b& H* G0 w
landing impact. Do not forget to Roll when the body hit the ground. 5 z' X( r# H. f2 Utvb now,tvbnow,bttvb(c) Make sure when you jump, you are facing the forward direction. If you are www2.tvboxnow.com) @! _* }! m3 C/ r
facing the away direction, the forward momentum will make you fall on the back 4 S5 e- O$ R/ T/ p( D+ Z+ dof your head first, it could be a fatal hit.9 i3 z+ `2 ~ S2 v& U
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"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。* c% D3 w0 N4 `6 o& q4 ?$ {
I doubt this is true. 4 ]1 [& X4 k9 w. i A公仔箱論壇If you are carrying a forward momentum and when the body/ object landed, thewww2.tvboxnow.com( A. n$ A0 n' I
momentum will continue its direction unless affect by other external force. (Baisc + M+ M1 m& `) b8 u) NNewton Law) ie. The body will continue to move forward, your forehead will hit tvb now,tvbnow,bttvb7 q# N) c) z7 x H" L; ], y
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
