Gravity carbonless car than spelling around the obstacles

Here is a rewritten and improved version of the provided content in English, with added details to make it more natural and engaging, while keeping the original meaning. The total word count is well over 500 words: --- There’s a car that moves without needing fuel or electricity — its power comes entirely from gravity. It sounds almost like magic, but this isn’t science fiction. It's real, and it's called the "Carbonless Car." These unique vehicles recently made their debut at the Zhejiang Institute of Metrology, where they competed in an engineering challenge that tested students' creativity and technical skills. The competition, titled “The More Barriers to Carbonless Cars,” challenged participants to design and build cars powered solely by gravity. Each vehicle used a hanging weight — typically a 1kg plumb bob — to generate motion. As the weight dropped, it turned gears that drove the wheels forward. This principle is similar to how mechanical watches work, where winding provides energy through gravitational potential. Over 270 students from more than 30 universities across Zhejiang participated in the event, which was part of both the Zhejiang University College Student Engineering Training Comprehensive Ability Competition and the National College Student Engineering Training Competition. The goal was not just to create a working model, but to ensure the car could navigate a track filled with obstacles. In the Tianjian gymnasium, two long tracks were set up, each marked with obstacles every meter. The cars had to travel as far as possible while avoiding these barriers. Some teams managed to pass over 30 obstacles, showcasing impressive engineering and balance. One team, led by Gu Binchao from the Zhejiang Institute of Mechanical and Electrical Technology, built a car with three small wheels and an aluminum pole on the balance platform. While it started smoothly, it eventually veered off course and hit an obstacle. Another team, Lu Kechao from the China Institute of Metrology, designed a car with three support rods, which helped it stay stable and successfully bypassed 31 obstacles — the highest number in the competition. Zhan Wen, a teacher from the China Jiliang University Engineering Training Center, explained that stability was crucial. Many cars failed because they lost balance during movement. The layout and number of poles also played a key role in ensuring smooth navigation. In addition to the S-shaped track, there was another challenge involving an "8-shaped track," where the car had to weave around two obstacles without knocking them down or falling off the table. This test required precise control and careful planning. Lu Kechao, who won first place in the S-shaped track, shared his experience: "Since I joined the carbonless car project, I became really passionate about it. I spent all my free time analyzing the problems, designing the car, and building it. Every detail mattered, from choosing lightweight materials to using strong, thin fishing lines for the pulley system." While some may question the practicality of such a car, Zhou Jilie, the chief judge of the competition, emphasized its educational value. "This competition is not just about building a car — it's about applying what you’ve learned in real-world situations. It encourages innovation, teamwork, and hands-on learning." He also pointed out that with growing interest in low-carbon technology, the future of gravity-powered vehicles might not be so far-fetched. "The main challenge is how to make the gravity cycle work efficiently. But with continued research and development, who knows what the future holds?" As the competition wrapped up, one thing was clear: these young engineers are not just building cars — they're shaping the future of sustainable transportation.

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