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Based on your coin magnification model, it is recommended to set the diameter to coin diameter + 0.2 mm
Using a coin as the weight, the default hole diameter for coin placement is 20.2 mm
And use metals with the highest density possible
Copper > Nickel > Iron > Zinc > Aluminum
Roly-poly Toy Principle
A roly-poly toy is a fascinating toy that self-rights regardless of how it is pushed. This phenomenon's underlying physics primarily involves center of gravity and stability:
A roly-poly toy is an amusing toy that automatically returns to an upright position no matter how it is pushed. The underlying physical principle involves center of gravity and stability:
The bottom of a roly-poly toy is equipped with heavier materials, ensuring the overall center of gravity is positioned near the lowest point at the base. This design ensures that when the toy is pushed over, gravity generates a restoring torque, which pushes the toy back to its upright position.
The base of the toy is curved. When tilted, the contact point with the ground shifts, causing the center of gravity to move towards a lower position, creating a tendency to restore balance.
When the roly-poly toy stands upright, its center of gravity is at the lowest possible point, representing a state of stable equilibrium. When disturbed by external forces, the center of gravity rises, but the toy naturally returns to the lowest point.
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