[quote="master"][quote=But the short answer is momentum is mass times velocity. Velocity being speed, increasing your speed means you will have more momentum (assuming you don't lose mass because of your increased speed
). Doc -I thought that the closer a body got to the speed of light the heavier it got??
Seriously though, as they say - There re two aspects of this issue with practical implications for a vaulter.
The first is that although you cannot change your mass and so increase your momentum that way - what you CAN do is ensure that you hit the pole with a solid body from top hand to take off toe, so that none of your momentum bleeds away into a soft sagging body - it all goes into driving the pole up and forward.
The second is that while it is important that stride length stays within certain parameters -already discussed at length on PVP - the critical point ,which has not been discussed here to my knowledge, is the DIRECTION of the foot strike to the ground. Is it an active down and back claw/strike, is it a passive contact or even a placement which will have a braking effect? The latter will certainly have a negative effect on your velocity.
Finally it is worth pointing out that the important thing in the vault is speed at the moment you leave the ground - not even speed five metres out from take off. And speed as you leave the ground will depend on many factors including of course the quality of your planting action and the nature of your take off.
I would suggest that a focus on both of those two elements will pay even greater dividends than following the US obsession with run up speed.
Mere knowledge is not the goal - but action. The Torah,