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Today I will explain two problems: problem of no ball and problem of impact and friction.

1. Some players always miss ball when serving. Let's analyze what problem is.

(1) Reasons for missing ball

Let's take a ball spinning from left as an example. When ball is tossed up and down, some people often stand face down with their racket. At this time, ball is also at bottom. He can not be touched, so he will definitely miss ball.

(2) Leak Solutions

You don't have to stand that long to send racket sideways. You can turn racquet slightly to side as you dribble, and then move forward while serving racquet instead of standing upright with whole racquet. The ball cannot land at all and there is no contact area. The same is true for forehand side spin or reverse spin, etc. Care must be taken to ensure that contact area between racket and ball is sufficient and can be changed at moment ball is touched.

Second, let's talk about impact and friction again. Many golfers fail to pull ball when they begin to master looping technique, or arc of ball is high and topspin is weak. Let's see what is reason.

First we need to understand relationship between impact and friction.

(1) Main impact

For example, when ball flies in a straight line and direction of our force (force) is just to penetrate center of table tennis ball, at this time there will be more impact components, and closer direction of force is directed to center of ball, more impact components will.

(2) Based on friction

If ball is still flying like this, but swinging upwards, direction of force deviates from center of table tennis ball at this time, then its friction will be relatively greater at this time.

(3) Manufacture of friction core

To create friction, swing speed must be high. Fast is core. If swing is slow, even if swing direction is at edge of ball, there will still not be much friction. It can only cause ball to go up, for example, a lot. When a person pulls ball, it will not spin. That's how he brings it. If swing speed doesn't come out, then ball still won't spin. Since ball has a direction of flight, ball will hit racquet, and if speed of swing does not exceed force of impact of ball flying and hitting racquet, then it will not be able to turn without overcoming it.

When swing speed is increased, friction force on ball surface will come out, and friction force will be stronger, and friction force on ball surface can be increased by rapidly applying force.

Ping-pong network organized by Liu Baosheng

November 30, 2023