The scientific principle of feathers flying, the scientific principle of badminton

Physics plays a vital role in the sport of badminton.

1. Reference principle: When playing badminton, how to effectively judge the position of the ball is very important. The environment on the field is unpredictable, and it is often necessary to choose a suitable object as a reference.

2. Principle of conservation of energy: In badminton, every time you hit the hungry ball, it is accompanied by the transfer of energy, and the biochemical energy of the human body is transferred to the badminton through the action of human torque. There is a loss of kinetic energy in the process of hitting the ball, and it is only analyzed in terms of elastic collision, if you want to make the speed after hitting the ball fast, you need to ensure that the kinetic energy before hitting the ball is large enough.

3. Principle of oblique throwing movement: The flight path of the shuttlecock after it is played out is the oblique throwing movement. According to the ship.

A structure peculiar to birds that is formed by the outermost cells of the epidermis is called a plume. Covering the surface of the body, it is light and hard, elastic and waterproof, and has the function of protection, flying.

There are three types of feathers in birds: regular feathers, down feathers, and hairy feathers. The feather branches of the main feather are densely feathered, and there are hooks or grooves on the feather branches, and the adjacent feather feathers are hooked to each other to form flat and elastic feathers. The positive feathers on the body surface form a windproof shell and give the bird a streamlined profile.

The wings and tail feathers play a decisive role in flight and balance. The structure of down feathers is characterized by the delicate shaft and the underdeveloped hook-like protrusions of the feather feathers, so they cannot form a solid feather. Duck down is the down feathers of a duck.

The hairiness is very thin and hair-like, and it grows between the main feather and the down feather, and can only be seen after the main feather and down feather are removed.

The main feather is a type of bird feather that consists of a feather shaft and a feather petal, and many feather petals are born on the feather shaft. It can be used to make fans, brooms and other supplies. The secondary feather is another type of bird feather, also called "hind feather", which is born at the base of the main feather, and is generally a cluster of scattered small feathers.

Down feathers are born on the body surface of young chicks and the base of the main feathers of adult birds, also known as cotton feathers, commonly known as down, which is a kind of bird feathers. Born at the base of the main feathers of adult birds or on the body surface of chicks. The feather trunk is degraded, and the feather branches are soft and clumped; The feather twigs are slender, unhooked, shaped like cotton wool, fluffy, and not petal-shaped.

It has a strong thermal insulation ability. Waterfowl are particularly rich in winter down, and duck down is commonly used.

The shaft of the down feather is short and transparent. The feathers are soft and grow in clusters at the tips of the feather shafts. The feathered twigs are slender and do not have small hooks and cannot be hooked into pieces, so they are soft and fluffy. Down feathers have the functions of heat preservation and body protection.

The feather shaft is thin and long, and the shape is like a hair. There are few feather branches, born at the top of the feather shaft, and there are many featherless branchlets. The slender feathers are scattered on the edge of the eyes, the base of the beak and the underside of the main feather, and have the functions of sensation and body protection.