Product Name: KX1936 Mechanics Cart (Tri-in-One)
Product Code: KX1936
Size: 150*90*70mm
Weight: About 150g
Material: metal frame + rubber wheels + plastic parts + axles + elastic bands + balloons + ropes + weights
Color: Mixed colors of single product
Battery Required: No
Packing: 500pcs
Box Specification: 600*450*550mm


The mechanics cart (tri-combination) consists of three experiments: the balloon experiment (principle of reaction and impulse), the rubber band experiment (potential energy to kinetic energy conversion), and the weight experiment (friction and gravity testing), making it a well-balanced and effective product. Note: The frame is made of galvanized iron, which is not very hard, allowing for slight adjustments to the vehicle's structure (personal customization).


The principle of counter-impulsive motion:
After releasing the balloon, under the action of pressure, the air escapes from the balloon, exerting a backward force on the surrounding air. According to the principle of action and reaction, the surrounding air exerts a forward force on the balloon, causing the balloon to move in the opposite direction of the blowing hole. In a simple explanation, this is the principle of mutual action and reaction. Initially, the balloon was in a state of equilibrium, with the pressure of the gas inside balanced by the reaction force of the tension of the balloon. When the opening is made, the tension at the point of the gap is considered to disappear in an instant, leading to the gas moving from a high-pressure area to a low-pressure area, spewing out from the exit.

Rubber band experiment:
The conversion of potential energy into kinetic energy, elastic deformation, elastic deformation refers to the change in relative positions of points within a solid caused by external forces. When the external force is removed, the solid returns to its original state, which is called "elastic deformation". The parts of an object that undergo elastic deformation, due to the interaction of elastic forces, also have potential energy, which is called elastic potential energy. The greater the deformation of the same elastic object within a certain range, the more elastic potential energy it has, and vice versa.

Weighing Force Experiment:
The principle of the gravity car movement is to convert the gravity of the falling weight into power to drive the car forward. However, while the car is moving forward, friction and other resistance will prevent the car from moving forward, ultimately causing the car to stop.



The initial work of human labor was completely completed by itself, and there was no such thing as cars and engines. If there were, before the use of oxen and horses, the human body was the engine. Slavery is a "biological engine." As human progress and development, people's understanding of nature deepens, and the ability to use and transform nature is increasingly strengthened. People not only use human power, animal power, but also know how to use water and wind power. Cars, that is, vehicles with their own power to drive, do not need to rely on tracks or electricity, can be mobile. Broadly speaking, vehicles with four wheels are generally called cars. Since the end of the last century, cars have experienced more than one hundred years of wind and rain. From the first three-wheel car built by Karl Benz at a speed of 18 kilometers per hour, to now, it has even given birth to a vehicle that accelerates from zero to 100 kilometers.A supercar that only takes about three seconds to reach 60 mph. In the past century, the development of cars has been so astonishing! At the same time, the automobile industry has also created many giants, who have established famous companies such as General Motors, Ford, Toyota, and Honda, which play a pivotal role in the economies of various countries. Let's look back on this history together, savor the bitterness and joy, and experience all the joys and dreams that cars have brought us... Like other modern advanced complex tools such as electronic computers, cars were not invented by one person sitting there. The initial invention of cars was not the current design. If you could see the cars of the time, you might also think that they are not cars. The development of cars also has a long history, and overall, the history of car development may be divided into three stages: before the invention of the steam engine, the advent of steam cars, and the beginning of mass production of cars.