Everyone,in the anicent Ming dynasty,when there were no electricity or steam to power boats,how did Zheng He navigate to the West?It is because he used a natural resource,the wind.Dating back to the old times,people have learned how to use wind energy to ammeliorate our lives.Wind performs a lot of work in nature.It can make the heat and steam in a large are to merge,balance,adjust the temperture and humidity.It can also deliver rain to far places,so the water cycle of Earth would be completed.Wind is very useful in daily lives,for example,a sailboat depends on to wind to move.Zheng He's voyages were successful because of the help of wind.
Air moving up on horizontal direction is called Wind.Wind is formed by the movement of air,as the air pressure on the horizontal direction is distributed unevenly.To put it simply,wind is the movement of air particles.Wind energy is formed mainly by converting the kinetic energy of the air particles to other forms of energy as they are moving.A sailboat is able to move forward as its sail is pushed against by wind.Looking out fo the changes in the set of the wind,sailors can adjust the angle of the sail to obtain impulse force for movement.
In this experiment,as the fan spins,air particles are starting to move,creating wind.Wind is used for sailing.A sailboat obtains sufficient thrust,so it can advance.