This is Not Truetvb now,tvbnow,bttvb% H S% ^+ c4 a1 t/ r
(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 公仔箱論壇4 f3 R( u6 C) i" R$ z
effect is not significant. OK this explain the speed aspect. ( X0 R, D u. k, y(b) Jumping direction: if you were in a car or a train carriage, you do not have a . ~/ x5 G% l! ^2 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 h) V9 p# u. @. h1 O
landing impact. Do not forget to Roll when the body hit the ground. V# _! P7 |1 i' t: A(c) Make sure when you jump, you are facing the forward direction. If you are tvb now,tvbnow,bttvb$ M4 o0 ?- i2 x! s
facing the away direction, the forward momentum will make you fall on the back 3 _1 L# p$ L8 M4 d5.39.217.76of your head first, it could be a fatal hit. , [+ \0 q% E/ g9 v0 PThis 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"公仔箱論壇# i* J. o. o# A! Y3 j. t' A0 i
I doubt this is true. " h" H- \5 x% }If you are carrying a forward momentum and when the body/ object landed, the公仔箱論壇/ r0 {) }% [/ \. g3 u/ m: m
momentum will continue its direction unless affect by other external force. (Baisc \1 a1 \3 `5 }4 w; XNewton Law) ie. The body will continue to move forward, your forehead will hit 8 t: f3 F" n7 }+ c- W- uthe 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
