单摆是一个理想化的物理模型,当它的摆角很小时,单摆的运动可以看做是简谐运动。单摆运动周期只与摆长和当地的重力加速度有关,与摆球的质量无关。生活中有一些类似单摆的运动,它的等效重力加速度等于单摆静止不动时摆线的张力和摆球质量的比值。 Pendulum is an idealized physical model, when its swing angle is small, the pendulum movement can be seen as simple harmonic motion. Pendulum movement cycle only with the length and the local acceleration of gravity related to the quality of the ball has nothing to do. There are some pendulum-like movements in life whose equivalent gravitational acceleration is equal to the ratio of the tension of the cycloid and the mass of the pendulum when the pendulum is stationary.