A falling object gains momentum as it falls.

物体下落增进动量。

《新英汉大辞典》

Methods: The freely falling object was used to simulate the animal models of closed cerebral trauma.

方法：采用自由落体法制备闭合性脑外伤小鼠模型；

youdao

"Several residents [reported] seeing what appeared to be two aerial explosions, followed by falling object," it said.

文档称：“据报道，几位当地居民都曾目睹两次空中爆炸后飞碟坠毁。”

youdao

So，the point is,every object falling under gravity is given by the same formula, but there are many, many objects that can have many histories, all falling under gravity, and what's different from one object and the other object is, when was it dropped, from what height, and with what initial speed.

关键是,每一个受重力作用下落的物体,都有同样的表达式,但是各个受重力作用下落的物体,都有不同的初始条件,所以它们的区别在于,下落时刻,下落高度和初始速度

耶鲁公开课 - 基础物理课程节选

The study of the past doesn't yield unalterable laws that allow one to predict the future with the same certainty that a physicist can chart the trajectory and velocity of a falling object.

NPR: 'Folly of Empire' Offers Critique of U.S. Imperialism