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Seesaw

Seesaw (game for children)
Seesaw, a toy for children with more than two people. Sitting on the seesaw, one person sits one head, one person goes up, one person comes down.
Chinese name: seesaw
Nature: Children's play equipment
Principle: The principle of leverage
Number of participants (two or more)
Pinyin qiao qiao ban

Explanation:
Children's play equipment. Install the shaft in the middle of the long and thick wooden boards, and then support it on the pillars. The two people will sit on opposite ends, alternately use the pedals to make one end stand up and the other end to fall, and repeat the game for fun. [1]
Principle introduction:
The principle of the seesaw is the principle of leverage. The pressure on the seesaw is power and resistance. The distances between the person and the fixed point of the seesaw are the power arm and the resistance arm, respectively.
Gravitational acceleration causes up and down. The higher one has a higher gravitational acceleration than the lower one, so the higher one falls. At the same time, the lower one is lifted up by the principle of leverage, and so on.
We all know that seesaw is a children's play equipment that requires cooperation to play. It requires cooperation between two children when playing. Therefore, this kind of children's play equipment is not suitable for children under 5 years old without the company of adults. Children play because the children do not know how to take care of each other's feelings, they don't want to play and just go down, they don't care what the other party is in, they are prone to accidents.
Safety Precautions:
1. Only one child can sit on one end of the seesaw. If the weight difference between the two children is too large, you can discuss with the child and play with a child of the same weight instead of sitting on the lighter side with another child.
2. The two children should sit on the seesaw face to face, do not turn over and sit back to back.
3. Ask the child to hold the handle tightly with both hands, do not try to touch the ground or let both hands go empty. Keep your feet where you pedal. If there is no place for pedals, you can hang it down naturally instead of curling up under the seesaw, otherwise the children's feet will be pressed when the seesaw is pressed down.
4. If other children are playing seesaw, keep a distance while waiting. Never put your foot under the tilted seesaw, stand in the middle of the seesaw beam, or try to climb up and down the seesaw.
Reference material
Seesaw Online Chinese dictionary