Y'know, it really doesn't matter how fast your going unless you're running headlong into the object (with your head), as the bicycle's velocity is parallel to the ground.
The head will accelerate towards the ground at 32 Ft/Sec/Sec regardless of horizontal speed, and will impact said ground at the same perpendicular speed regardless. Forward velocity will only dictate how far you are dragged along it.
Just thought I'd throw that tidbit into the arguement ;-3)>
Y'know, it really doesn't matter how fast your going unless you're running headlong into the object (with your head), as the bicycle's velocity is parallel to the ground.
The head will accelerate towards the ground at 32 Ft/Sec/Sec regardless of horizontal speed,
Horizontal speed will affect the rotating moment applied by the ground, on the head, however.
