常出现一些模糊认识，即认为单摆在振动中所受的回复力就是摆球所受重力与绳子拉力的合力，显然，这是错误的。
To state the restoring force of a simple pendulum during oscillation is the resultant force of the gravity of the ball and the pulling force of the thread is wrong .
本实验针对实验室用物理摆的特性，设计出另一种用物理摆测量重力加速的方法。
The experiment uses a trait of the physics pendulum and designs another method to measure the acceleration of gravity.
本文研究了摆性的重力效应，即积分陀螺加速度表的摆性在重力场作用下的变化现象。
This paper analyses the gravity effect of pendulosity, that is the variation phenomenon of PIGA pendulosity in the gravity field.
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