Do you know why is golf ball not as smooth as ping pong ball, but covered with evenly concave small pits?
Usually, people believe that the rounder the surface of a ball, the smoother its surface, and the lower its friction with air. Therefore, under the same force, a ball with a smoother surface should fly farther away.
But in fact, this is not the case. Scientists' research has shown that under the same conditions and the same force, golf balls with rough surfaces experience only half the resistance during flight as golf balls with smooth surfaces, and the distance traveled can even reach five times that of golf balls with smooth surfaces. There is a physical principle behind this phenomenon.
When an object moves in air, it mainly experiences two types of forces: one is the frictional resistance between the surface of the object and the airflow, which we all know, and the other is the pressure difference resistance between the front and rear ends of the object.
Figuratively speaking, for example, when a spacecraft returns to the atmosphere, due to its extremely fast speed, the front end of the spacecraft violently collides and rubs against the atmosphere, generating enormous pressure; The air behind the spacecraft is expelled, and according to the principle of gas pressure, the pressure behind decreases, creating a pressure difference in the direction of the backward direction. This force is called pressure resistance.
The function of the small pits on the surface of a golf ball is to tightly adhere the surface air to the ball, reducing the resistance of the air behind it and allowing the golf ball to fly farther and faster.
When an object moves in air, it mainly experiences two types of forces: one is the frictional resistance between the surface of the object and the airflow, which we all know, and the other is the pressure difference resistance between the front and rear ends of the object.
The function of the small pits on the surface of a golf ball is to tightly adhere the surface air to the ball, reducing the resistance of the air behind it and allowing the golf ball to fly farther and faster.
