National Junior Robot Technology Level Examination First-order seesaw model Practical construction drawings A simple question on seesaw Brief Answer 1. What is the name of the work in the picture and what is its use?Answer: The seesaw is mainly used for outdoor fitness and children's entertainment. 2.What principles are used in this work?Answer: The leverage principle is used in the work. The leverage is a lever that can rotate around a fixed point. Leverage is divided into equal arm lever, labor-saving lever and labor-intensive lever.The five elements of lever are fulcrum, power, resistance, power arm and resistance arm. 3.Write down the general application of this principle in life? Answer: Wine opener, scissors, chopsticks, pliers, tweezers, etc. 4.Please describe the construction process of this work.Answer: Firstly, the seesaw support rod was built, and the vertical connection of the parts was used in the process.Secondly, the crossbar of seesaw was built. The lengthening of the beam is used in the process.Finally, the fulcrum link is used to minimize friction, which ensures the flexibility of seesaw in the process of motion.