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如何？王尚书听了暗赞他切中要害。III. Other DetailsThank you for watching. I hope you didn't watch it late at night.Deployment/retraction landing gear G G only works if the landing gear of the current aircraft is retractable.3. Physical period: Uniform circular motion is a kind of periodic motion. The so-called periodicity refers to the fact that after a certain period of time, the moving object repeats back to its original position, and the instantaneous speed repeats back to its original size and direction. The time it takes for an object to move in a uniform circle is called a period. The period is expressed by the symbol T, and the period is also a physical quantity describing the speed of uniform circular motion. The long period indicates the slow motion of the object, while the short period indicates the fast motion of the object.Second, the main differences between the two are as follows: