Twelfth Grade, Mechanical Engineering Science Projects (4 results)
If you're interested in object motion and enjoy building things or taking mechanical things apart to see how they work, then it sounds like you'd be interested in mechanical engineering.
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Try the annual Engineering Challenge from Science Buddies! Open to all students worldwide, a new challenge and prizes are announced every January. Explore the current challenge as well as ones from past years!
Before cannons widely replaced them, siege engines were often used by armies to throw large stones and other projectiles to break down castle walls. One of the most advanced siege engines used in the Middle Ages was the trebuchet, which used a large counterweight to store energy to launch a payload, or projectile. The horizontal distance the payload would travel is called the trebuchet's range. Figure 1, below, shows a modern reconstruction of a trebuchet.
The range of a trebuchet has…
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In this engineering challenge, you will build a car powered by nothing but a rubber band. The farther the car goes, and the fewer materials you use to build it, the higher your score. Enter your score in the 2024 Science Buddies Engineering Challenge for a chance to win prizes! Teachers, lesson plan versions of this challenge are also available.
Is it possible for an entirely wind-powered vehicle to travel directly downwind faster than the wind? This might seem counterintuitive or like it would violate the law of conservation of energy. After all, any good scientist knows that perpetual motion machines are impossible. However, as demonstrated by YouTubers Rick Cavallaro, Derek Muller (Veritasium), and Xyla Foxlin, you can take advantage of some tricky physics to make this vehicle work. Can you build—or even improve—your own…
The amount of energy produced by most photovoltaic (solar) panels is limited, due to their immobility. However, when photovoltaic panels track the movement of the Sun, their efficiency increases significantly. This can be done with computers and sophisticated electronics, but for rural or wilderness settings, a "low-tech" sun tracker would be beneficial. A solution exists in nature: the sunflower. The challenge in this science fair project is to design and build a device that imitates the…
Noise is everywhere. From the clanking of a cowbell to the din of the lunchroom, we are surrounded by noise. Sometimes there's no way to get away from it, but there is a way to deal with it—constrained-layer damping. By simply creating a layered sandwich of somewhat flexible materials, what was once a noisy cowbell can become a "noise blanket." This science fair project shows you how to transform a noisy piece of metal into a sound-muffling constrained-layer damper. You'll record the…
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