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07-18-2006, 08:37 AM
What you are referring to is a total transfer of energy and while it works well with pool balls, it does not work well when you have objects of disparate mass. In the case of the hitter and the volleyball, the followthrough is essential as there is no way that the hitter is going to transfer all his energy into the volleyball. Remember:
Ke = 0.5 *m * v²
Assuming a total transfer of energy, a 1lb volleyball (that was the estimated perball shipping weight in my latest order), a 144lb volleyball player, we could get something like this:
Ke = 0.5 * 144 lb * (v1)² = 0.5 * 1lb * (v2)²
or
v1 = 12 * v2
That means that if there was somehow some magic way of transferring all your energy, the volleyball would explode at 12 times the velocity of the player.
Ok, this is all garbage because it is not just the player's body, but also his arm speed, wrist snap, etc.,... BUT follow through is important and total transfer of energy is not possible when the object hitting weighs more/has more mass than the object being hit. |