What is the scientific principle of a tumbler made of eggshells?

To make a tumbler with an egg shell is to add a heavy object to the bottom of the empty egg shell, such as putting screws or sand into the egg shell through a small hole in the egg shell, standing it up, carefully dropping candles and fixing the screws at the bottom of the egg shell to make it lighter and heavier, thus becoming a tumbler.

Introduction of tumbler principle;

1, light objects are relatively stable, that is, the lower the center of gravity, the more stable it is. ,

2. When the tumbler is in equilibrium in an upright position, the distance between the center of gravity and the contact point is the smallest, that is, the center of gravity is the lowest. After deviating from the equilibrium position, the center of gravity always rises. So the balance of this state is a stable balance.

No matter how the tumbler swings, he won't fall down. In order to increase the stability of objects in life, we often increase the weight below, such as fan base, microphone bracket, bus stop sign and so on.