Design features and plenty of goals in team sports

Ball - sports equipment, which is actively used by man since ancient times. Spherical devices have the status of one of the most favorite "toys" the many peoples of the world. In our publication we would like to talk about the design features and weight balls, intended for popular competitive sports.

Soccer ball

sports equipment for the game of football is made up of a number of elements. This ball comprises a covering, lining, and an inner chamber which is filled with air. Even in the middle of the last century it was considered the standard tires, made of genuine leather. However, in subsequent synthetic material we decided to replace the foundations, because the skin has a property to absorb moisture, which leads to an increase in the mass of the ball during the game.

Nowadays tires football shells produced mainly from PVC and polyurethane. Synthetic also a lining which separates the chamber from the outer layer. The presence of elements of the representation is crucial. After all, the nature of the lining depends on how will bounce a soccer ball and how long the projectile can maintain the original shape.

The camera of a soccer ball is made with polyurethane, latex and butyl. The combination of materials allows the structural element for a long time to hold a air and remain as flexible.

Finally, what is the mass of a soccer ball? Sports equipment, intended for children training, according to the established norms of the international organization FIFA, must weigh between 369 to 425 grams. As the tire manufacturing material can be used as natural leather and synthetic substrate. In turn, the weight of the ball for futsal is 400-440 grams. What weight have shells that are used in all official competitions on the big football at senior professional level? The mass of the ball used in the game under the FIFA, is no more than 450 grams.

Tennis Ball

Sport projectile for a large class tennis represented as a rubber membrane, pasted cloth, which has a fuzzy surface. Indicator ball elasticity determined by the pressure level in the inner chamber. Characterization of individual shells varies from 30 to 50 millimeters of mercury. As a result of the fall of a tennis ball with 2, 5 meters it must exhibit reverse rebound to a height of not less than one and a half meters.

Tennis balls are divided into several categories. Among them are:

1. High. They have the highest measure of stiffness. Demonstrate impressive speed rebound from a hard surface. Used during the competition on clay surfaces.
2. Accessories. Have a normal rebound. Used in training practice and during the game on hard synthetic surfaces.
3. slowly. In size by almost 6% more high balls. Characterized by the rapid loss of speed during flight. Take such shells athletes is much easier, so that the game becomes more intense spectacular techniques.

What is the weight of a tennis ball? Mass all projectiles above categories corresponds to the indicator 57, 6 grams. Permissible deviation from the norm is considered to be at 0, 9 grams.

volleyball

Standard volleyballs consist of 6 separate panels. Each of these may be divided into several sections. The inner chamber is covered with a fabric winding. Nowadays, the outer shell is no longer stitched, as it was before, and glued. This solution has allowed to significantly improve the aerodynamic properties of the projectile.

What is equal to the weight of volleyball? This shell is one of the easiest of all the devices that are used in team sports. Mass modern volleyball may be only 260 to 280 grams. A similar standard is also used in beach volleyball.

Basketball

Shells to engage in this type of sport, as a rule, are made of high-strength, not too elastic rubber. In the children's competitions are sometimes used balls, which are made with synthetic or natural leather. However, this standard has been steadily moving away into oblivion. The mass of the ball, intended for children, should not exceed the value of 500 grams.

What can we say about the standard shells, which are used to playing at senior official level? Such products are characterized by high mass. Weight basketball designed for professional competitions, should be between 567 to 650 grams.

Handball ball

sports equipment for the game of handball can be made of synthetic or natural leather. The main requirement - availability of calibrated spherical shape and lack of gloss on the surface of the tire. Officially, there are several handball balls sizes:

• For children aged 8 to 14 years old - weighs less than 330 grams.
• For women's teams aged 14 years and men over 12 years old - the weight of about 375 grams.
• For professional athletes who perform at senior level, weight from 425 to 475 grams.

Baseball

In contrast to the above-mentioned shells, ball for a baseball game, has a relatively modest settings. The shell has a multilayered structure provided by a rubber or cork core, winding and outer tissue leather tire. During cast and pin bat unimaginable scope can reach speeds. For this reason, the players body is protected by a serious outfit. As for the weight of the ball, a standardized measure equal to 142 grams.