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Originally Posted by Tom Bottiglieri
You mean negative acceleration, right? 
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No, the contest is called egg decelleration. The flyer said something about an egg being able to fall 2 miles as long as it doesn't decelerate too suddenly.
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Originally Posted by greencactus3
also keep in mind the faster the Vx the less the impact force
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That would only work if the system (like an airplane, as you mentioned) was such that >Vx resulted in <Vy. If we were to follow a particle, Vx and Vy would be completely independent of each other. Assuming no spin, Vx creates a rubbing force on the object, while Vy causes a crushing force. Well, the acceleration does, but it'll be proportional to V. I guess that, in general, <Vy will result in <dVy/dt.
In something like a parachute, I still don't think that Vx matters. How ever your system is designed, in order to decrease the impact force, dVy/dt has to be minimized. If your system is such that Vy is inversely proportional to Vx, then yes, >Vx would create <Vy and thus <dVy/dt.