若有一个质点以角速度w沿半径为r的圆周匀速运动,则沿直径方向的分运动是简谐运动.匀速圆周运动的轨道半径r、速率v和向心力F的大小都保持不变;而简谐运动的位移x、速度v和回复力F的大小和方向都发生 If a particle moves at constant angular velocity w along a circle of radius r, the subdivision motion in the diameter direction is a simple harmonic motion. The orbital radius r, the velocity v and the centripetal force F of the uniform circular motion remain unchanged; The magnitude and direction of the displacement x, velocity v, and force F of harmonic motion occur