We observe that Camiounti runs differently on the surfaces, but most generally, it runs smoothly with no issue. On the tissue, on sand or other soft surfaces or terrains, Camiounti does not adhere properly and runs with some difficulties.
Generally, we observe that Camiounti has difficulties on all terrains and surfaces, as it cannot move easily as before with the rubber bands. We observe that the wheels slip, mainly on the tiles, plastic and metal, which are smooth surfaces. But Camiounti is able to run well on rough surfaces like wood or the carpet. It's the principle of friction. It's the principle of rubber tires like on the wheels of cars, trucks, planes ... The wheels are generally made of smooth materials like metal for cars and others or fine wood for Camiounti. So they tend to slip on other surfaces either on smooth surfaces or even rough surfaces. As Camiounti and other vehicles are made to run on different surfaces and roads with no issue, we add rubber tires (like the rubber bands) to make wheels more rough and create high friction coefficient for them to adhere to the roads and other surfaces.
The more we wind-up the rubbers bands, they start changing color and become thinner. When we let go Camiounti, it runs longer and further when we wind-up the rubber bands the longer. So, the more we put time and then our <>energy to load Camiounti, the more it runs. It will have then more accumulated energy. And this energy is accumulated into the rubber bands which seems to undergo a deformation (by becoming longer and thinner). You can take one of the spare rubber band and elongate it as much as you can to observe the same phenomenon.
Camiounti is propulsed by the rear wheels which gives the energy and thus force to drive forward. We call it rear-wheel drive. This energy comes from the rubber bands winded-up. This energy is stored by the deformation of the rubber bands, as a rubber band when elongated and then released comes back to its initial state. This deformation energy is simply called elastic energy. We find it in many devices, mainly in the shape of metal springs which are used for mechanical toys (cars), but also sophisticated systems like door-closing system or firearms ...
Camiounti uses, like all other vehicules (cars, trucks, planes, boats), gears. Gears are also called cogwheels, because they are simple wheels but with teeth on the edge that engage on the teeth of other gears. When a gear is rotating, it drives the other parts (gears) engaged with its teeth or on its axle. This is called transmission of power or movement. It's the same thing as in the gearbox of a car. In addition to the rotation transmission, when a drive gear is connected to a bigger gear, the second gear will rotate slower than the drive one. When a drive gear is connected to a small gear, the second gear will rotate faster.