The main purpose of this research is to establish and validate the flight movement equation of a badminton, and found the relationship between the velocity of badminton and the air resistance. The research method is based on the motion laws of aerodynamics, which establish a motion equation of flight trajectory under the influence of the gravity and air resistance by applying the theory of aerodynamics. The results show that the motion equations of flight trajectory of a badminton can be determined through the structure of terminal velocity, and the measured data is quite good fitting with the prediction of badminton movement trajectory. Findings also show, the resistance is proportional to the square of the badminton's speed. In addition, the angle and intensity of the wind may affect the trajectory.
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