기능

• The bird and the weight are connected by a thread, and the bird is placed on a desk or a laboratory table, and the weight is suspended.
• If you push the bird lightly from the side, it will walk slowly while rocking its body back and forth.
• When the weight moves, the bird moves, and when the weight stops, the bird stops, so you can confirm that the amount of change in potential energy is balanced by the amount of change in kinetic energy.