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Table Tennis topspin

947,242,3452010-01-31 23:01:36 +0000 #1
play table tennis, the top spin explanation is that A: Because the ball rotating the ball at the top of the air flow rate of a small pressure strong. B: As the ball rotating the ball beneath the great pressure of the air velocity small. Why
anotherfire2010-01-31 23:09:42 +0000 #2
A and B is a mean, upstairs a few trying to say.

Why? Because the ball is flying forward, and this is translational. At the same time the ball is still rotating, the upper surface of forward rotation, backward rotation under the surface. Therefore, the integrated result is that the relative air velocity on the surface of small, under the surface.

According to Bernoulli's equation, velocity large local pressures is small, so the pressure under the surface of the small, the ball will go down in flight process. This is the principle of topspin.

By the same token you can also think of the next spin principle.
Xiu Xiu ah you2010-01-31 23:27:09 +0000 #3
A
hzkelement2010-01-31 23:15:11 +0000 #4
A because the air at atmospheric pressure on small, so the pressure around the powerful???
Liuxiaoming_js2010-02-01 00:39:29 +0000 #5
A.

For the top spin, ball point above the rate of the overall direction and the ball forward in the same direction, and airflow in the opposite direction, the bottom of the sphere that the opposite situation. In this way, the ball at the top of the speed of air relative to the ball a little bigger, so the ball at the top of gas pressure smaller. thus gave rise to topspin

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