This is Not True 3 }, _$ q* t6 D5.39.217.76(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 ) D; V" Q6 \ q6 wTVBNOW 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.tvb now,tvbnow,bttvb- e1 A9 }' F# s+ B) C9 h3 g- m
(b) Jumping direction: if you were in a car or a train carriage, you do not have a 7 {5 ^9 o3 c9 ~5 q
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 6 a1 n6 Q8 c# a. x& s4 A% D6 Y
landing impact. Do not forget to Roll when the body hit the ground./ e; U! X& `7 I6 c/ ]9 |
(c) Make sure when you jump, you are facing the forward direction. If you are tvb now,tvbnow,bttvb% f2 |$ }* x7 }( k3 `2 M
facing the away direction, the forward momentum will make you fall on the back 5.39.217.76 v; N( o2 d- n/ Q: Z
of your head first, it could be a fatal hit.5.39.217.768 X+ ~. U8 Z' J, X# f* n$ ^
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"0 ~0 B1 p8 X {- f
I doubt this is true. 3 J2 h9 j* l6 W3 g4 k) K6 \If you are carrying a forward momentum and when the body/ object landed, the5.39.217.76; }+ u0 Q: s, P: H! C; G
momentum will continue its direction unless affect by other external force. (Baisc ) g% ~ U9 M! W# Q- q; Ftvb now,tvbnow,bttvbNewton Law) ie. The body will continue to move forward, your forehead will hit H0 ?7 C" H; z5.39.217.76the 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
