Explanation of the working principle of okiagari-koboshi

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Explanation of the working principle of model (okiagari-koboshi)

  • Principle One: Centre of gravity

Since the okiagari-koboshi is a self-righting doll and would not topple over, the centre of gravity has to be as low as possible in the model. According to the concepts of centre of gravity, to make an object have a lower centre of gravity, the object has to have a heavier base and have a larger base area. Thus, these concepts were implemented into the process of making the model. It has a heavy base in comparison to the model’s body, and has a large base area.

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  • Principle Two: Stability

One of the key properties of the okiagari-koboshi is that it does not topple or fall down no matter how one pushes it. The okiagari-koboshi would rock back up to its original state and position. To fulfill this requirement, the object has to remain at a stable equilibrium at all times, regardless if it is being pushed. To keep the model at a stable equilibrium, the centre of gravity must be as low as possible and the base area as large as possible, so as to keep the model at its maximum stability. The weight ...

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