Product name: KX1936 mechanical car (three-in-one)
Item no: KX1936
Size: 150 * 90 * 70 mm
Weight: about 150g
Material: metal support, rubber wheel, plastic accessories, axle, rubber band, balloon, rope and weight
Color: multi-color mix single product 
Battery use: no
Packing: 500 PCS
Rules: 600 * 450 * 550 mm


Mechanics car (triad) respectively is: the balloon experiment (principle of recoil move), the rubber band (potential energy into kinetic energy) and Jordan farmar gravity experiment (friction force, gravity, test) is a tie-in effect is a good product, reasonable experiment tip: frame is galvanized iron, is not very hard, you can fine tune the vehicle body structure (modified) personality.


Principle of recoil action:
   Loosen the balloon after opening, the air pressure, under the action of came out of the balloon, can the outside air has a backward force, according to the action and reaction, the outside air to the balloon have a forward force, so the balloon to blow air movement in the opposite direction, simple explanation is the mutual acting force, start the balloon is in equilibrium, the gas pressure in the balloon pressure caused by the tension of the balloon reaction force balance. Once opened, the pressure in the gap can be seen to disappear in an instant, causing the gas to move from the high pressure to the low pressure and shoot out of the outlet.

Rubber band experiment:
   Potential energy is converted into kinetic energy, elastic deformation, elastic deformation refers to the solid by the action of external forces caused by the relative position of the points changed, when the external force removed, solid back to the original state is called \"elastic deformation\". The elastic deformation of the body between the parts, due to elastic interaction, also has a potential energy, this potential energy is called elastic potential energy. The larger the deformation of the same elastic body in a certain range, the more elastic potential energy it has; otherwise, the smaller it is.   

 Weight gravity experiment:
   The principle of gravity car motion is to convert the gravity of the falling hammer into the driving force of the car to drive the car forward. However, when the car moves forward, the resistance such as friction will prevent the car from moving forward and eventually make the car stop. However, as the car moves forward, resistance such as friction will prevent the car from moving forward and eventually stop the car.



The first work of man was done entirely by himself, and there were no cars or engines at all, if any, but shares in the human body, which were used before cattle and horses. Slaves are a kind of biological engine. With the progress and development of human beings, people have a deeper and deeper understanding of nature, and the ability to utilize and transform nature is increasingly strengthened. People not only use human power and animal power, but also know how to use water power and wind power. An automobile is a vehicle that is powered by its own power and can move in motion without having to rely on rails or electricity. Broadly speaking, vehicles with four-wheel drive are generally referred to as cars. Since the beginning of the last century, the automobile has gone through more than one hundred years of ups and downs. From the first three-wheeled car built by Karl Benz at 18 kilometers per hour to the present, supercars have gone from zero to 100 kilometers per hour in just over three seconds. In these 100 years, the speed of automobile development is so amazing! At the same time, the auto industry has also produced a number of giants, who single-handedly created gm, ford, Toyota, Honda and other important in the economy of the famous companies. Let us look back at this period of history, taste the bitterness and joy, experience the car to bring us all kinds of joy and dreams... The automobile, like other modern sophisticated tools such as computers, was invented by no one sitting there. The car was not invented in the way it is today, and if you could see it, you might think it was not a car. The development of automobile also has a long history. Generally speaking, the development history of automobile may be divided into three stages: before the invention of steam engine, the advent of steam automobile and the beginning of mass production of automobile.