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C Robert move the ball! How to understand fluctuations in the ball?

Sweet potato was not cooked2010-04-15 12:12:01 +0000 #1
Such as title, hope to share insight on the fluctuations in global understanding!
Mestiano2010-04-15 12:17:04 +0000 #2
Simply put, that is, round things, like the ball, or cylinder, through the air, in the formation of spiral flow in the rear, for football, the football more light, which shares airflow will affect the ball's trajectory to produce and down to the Comparative Study and Integration of the change, making it difficult to judge the goalkeeper.

But only turn football Otherwise, once the switch up, the formation of pressure difference on both sides of the ball, will become general, the rule curve ball, the goalkeeper is also easy to judge.

Also in the volleyball serve, the player will not turn the ball first issue, so the ball's flight path instability, so catch those mistakes. This is easy to think of C Law's free-kick even if the comparison is being shot, the goalkeeper is also prone to get rid of.
Hey Hey Russia2010-04-15 12:20:55 +0000 #3



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