1.4. Tangential velocity of the spinning ball
From now, I'm going to write more details about the spin of the ball. So, to the readers, I want you to write with marker the longitude and latitude on the ball such as shown in the below figure, and get familiar to the spin.
Now, Let us assume that the ball is spinning clockwise in the vertical direction. The ball is spinning at the fastest tangential velocity on the equator line. In contrast, the tangential velocity is a few near the poles of both sides. Oh no, it's unlike the earth equator, a ball can also be spin in the vertical direction not only in the horizontal direction.
Tangential velocity decreases slowly from the 90 ° to the 45 °in angle(θ). And the 45 ° or less decreases linearly .
Tangential velocity of the spin from the opponent is faster near the vertical equator, and it become slower at near the pole. To fly the ball to your intended direction, it is necessary not to be defeated by the opponent's spin. For this purpose, when you touch the ball, it is better to touch near the poles rather than near the equator.