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彈簧振子在運動過程中,受到的作用力與位移成正比,且方向相反.F=-KX.也就是說,受到的是個變力.但是\x0df=ma=-kmx 仍然成立(牛II).\x0da=-kx 現用高數的知識.能導出是個周期性運動.
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