Why are badminton rackets oval?

Safety, no edges and corners, hurt people.

The round hand is unstable, so it is oval.

By the way, all perfectly spherical ones are unstable.

Bonus points.

1.Portrait and horizontal, if you think about the effect of catching the ball, it is easy to understand.

2.The rules of badminton are said to be "over the waist" and "over the hand".

3.Cutting balls are more convenient.

The ellipse is more stable than the perfect circle.

Reach maximum hitting area with the most flexible weight and wind resistance.

1. According to the principle of geometry, in the case of the same circumference, the area of the circle in the plane figure is the largest, and because the control range of our hands is limited, it is more beneficial for the racket to make a circle.

2. When people hit the ball, the axis (cue) is facing any direction, if the racket is made into a square or other angular shape, due to the asymmetry of the center, it is difficult for us to judge whether we can catch the ball according to the size of the racket itself.

Based on the above two points, it seems that it is more appropriate to choose a round racket.

But: 1, if our racket is round, when hitting the ball, because the racket rotates around the grip point (i.e., the hand), it is obviously not as large as the facing surface of the racket that is elliptical. (This refers to an ellipse with the semi-major axis and the club in a straight line).

2. According to the principle of rotational motion, if a circle winding around the line wants to increase its swept area, it is necessary to lengthen the length of the diameter with the same diameter as the angle of the motion route of the circle.

In this way, an ellipse is more suitable for making a racket than a circle.

3. However, in order to increase the power of the shot, the position of the center of mass of the ellipse must be adjusted so that it is closer to the point of rotation, so that the racket is not elliptical in shape, but in the shape of a pear.

This also explains why the end of the badminton racket closer to the club has less curvature and is more rounded.

The square tip can increase the effective hitting area with the same surface size. So it's easier to attack.

That's just the hand-down that has been handed down by the people, you know?

The racket, which should be made in a circle, is the most reasonable, just like a target for shooting, it is all round, and as long as the ball falls within a specified radius, it can hit the ball

If it is a square or other shape, it is not in the area with a radius of 5 cm (5 cm is a hypothesis, meaning the place with the largest radius), and only four corners hit the ball, and the four sides are empty.

Not to mention, if there is a hole in the middle of the racket, it will be even more difficult to play...

As mentioned above, it makes the most sense to use a circle.

But it's oval, why?

Because the racket is moving when playing, it should be made into an oval to make the most reasonable.

In order to better catch the oncoming object, a circle that is moving very fast needs to be lengthened by the same diameter as the angle of the circle's path.

The length of the diameter of the circle is extended, and the circle becomes an ellipse