Teacher Physics Small Experiment Teaching Aids School Science and Technology Museum Creative Science and Education Small Gift Large Balance Bird Balance Eagle Ornaments

[Demonstration method] use the bird's mouth to stop at the fulcrum. [Principle description] the reason why the balance bird is balanced is that the actual center of gravity of the whole bird is below the point on the tip of the mouth. Although it seems that the whole body of the bird is in the air, and the focus of the bird is on the finger, the actual weight of the bird's wings is relatively heavy, but the center of gravity of the whole bird is directly below the tip of the mouth. The fulcrum of the finger is point B, and the Bird's center of gravity is point a, just like a basket hanging on the finger, it will shake without falling, and the bird can be held firmly. [Expand production]] simple balance bird: take a thin iron wire (about 20cm) and bend it into an inverted W shape, which is as long as left and right. Add Clay (the weight should be similar) below both sides, and put the central fulcrum on the finger. It's done. Features: The center of gravity is concentrated and lowered, and the fulcrum rises. The structure is very light and the left and right weights are similar. [Large size] about 16 * 9cm plastic base about 6 * 6cm [small size size] about 13 * 6.8cm plastic base about 5.5 * 4cm