Another obstacle that has taunted humanity is gaps or holes.
To help over come this obstacle a tracuer will practice what are called precisions.
Precisions or broad jumps are a static long jump that involve projectile motion and center of gravity
http://www.youtube.com/watch?v=DZNypfg22Nw
The gif above illustrates proper form for jumping on on a level surface
If we label the hips as the center of mass we notice that they finish
at a position lower than which they starter, this maximizes time in the air.
Looking at a manipulation of the the 2nd kinematic equation above we see that that the trajectory of
the tracuer is parabolic in nature acting around the center of gravity which we assume is around the hips.
http://www.youtube.com/watch?v=Tk1NBZMUXB8
Mapping a parabola onto the path of the tracuer we see that as he is landing his knees bend to allow his
center of gravity to make it on on top the obstacle. While his arms counter act the torque of the bending kneesat the Apex.
http://www.youtube.com/watch?v=Tk1NBZMUXB8
Mapping this tracuers trajectory we see that he actually lowers his hips and aims them at his mark
to help decrease time left in free fall thereby minimizing impact and being more cautious
Disclaimer all jumping methods shown above have taken proper precautions
and tested their landing sites unlike the gif shown below
NBC.com
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