點解乒乓球高速飛行個時個"軌道"會弧形而唔係直線??

the rotation of the ball create pressure difference between the left side and the right side, or top/bottom side, of the ball. higher pressure side will induce a force pushing to the low pressure side. therefore u would see the ball flying in a curve. same rule can apply on soccer, baseball, tennis ball....all rotating object. just that ping pong ball is very light in weight so that it is easier to create the curve path.

因為個球拍果D膠~
球拍果D膠磨擦個波果陣會導致個波係空中旋轉~
跟住個波就會依住個弧形既軌道行啦~
就仲情況好多人都叫佢做"錯旋"~
P.S:上面個字唔識打~打個"錯"字你應該明~