The part-1 describes the basic elements that govern the tactics.
1.1. Movement of the Ball
The momentum of spin is converted to the momentum of flying by the friction of racket rubber, and vice versa.
1.2. Magnus Effect ★★★
The reason why giving a ball an upward rotation makes it easier for a powerful ball to enter the table is explained from the Magnus effect that controls the flight motion.
1.3. Effect of Rubber★★★
Have you ever had the experience of making it harder to spin the ball unexpectedly as a result of thickening the rubber, thinking that you can put out a powerful ball? Here, the reason is explained together with the relationship between the rubber thickness and the spin.
1.4. Tangential Velocity of the Spinning Ball
A spinning ball can minimize the effect of its spin depending on the angle of touch, and conversely, the force of that spin can be used for flying.
1.5. Directions of Bouncing Ball
When the spinning ball hits a stationary racket, it changes direction due to its rotation. If you do not know it, you will hook the ball on the net or the ball will jump over the table.
1.6. Spin Speed and Swing Speed
Depending on the rubbing direction and speed of the racket rubber, the spinning ball can be spun or the spin can be changed to jump.
1.7. Spin and Flight Speed by Hitting
Even if you swing with the same force, it is possible to change the ratio of spin speed and flight speed depending on the angle of the racket and the place where the ball hits. It is important that the size of the flight can be changed not only by adjusting the force but also by consciousness.
1.8. The Basic of Swing
The basics of swinging are the basic posture and then the expansion and contraction of the arm joints. And don't stop the swing in the middle.
1.9. Relation of Swing and Ball ★★★
Can you distinguish between a short ball near the net and a long ball behind the table? If you know that the flight distance of the ball is proportional to the gyration radius of the arm, you can easily get any flight distance.。
1.10. Swings to Empower the Ball
If you use the elbow and wrist joints at the same time, the radius of gyration will increase and you can produce a ball with a greater impact.
1.11. Relational Expression between Spin and Swing Speed★★★
When the rotation is changed, a force moment is acting on it. If the moment is not acting, the current rotation is continued, or if there is no rotation, it continues non rotation.。
1.12. Angular Momentum at the Impact Point
Assuming that the angular momentum given by the equator of the ball is 1, if the ball hits the rubber at a 90 ° angle, all the angular momentum is consumed in the jump. Hitting the rubber at a 20 ° angle converts the angular momentum of 0.12 into a jump and consumes it, leaving 0.88 as a rotation.
1.13. Basic Directions of Return Shot
The opponent is in the direction in which the ball has come.
The direction that has no opponent, that is the V-direction from the direction which the ball has come. So, the basic direction to return the ball should be the V-direction from the opponent's ball trajectory.
1.14. Vector
When describing table tennis tactics, the "addition and subtraction" of the quantity "vector" with direction and magnitude is indispensable. The minimum required knowledge is explained here.
<Break> Flight Simulator for the Table Tennis Rubber
On this page is able to simulate the ball flight tragectory by setting rubber performances. Set a rubber name, the speed factor, the spin factor, a trajectory color, and press the Drawing button.