the ideal falling motion of something subject only to a gravitational field
a sudden sharp decrease in some quantity;
"a drop of 57 points on the Dow Jones index"
"there was a drop in pressure in the pulmonary artery"
"a dip in prices"
"when that became known the price of their stock went into free fall"
free fall的用法和样例:
例句
For large, extended chords thrust is preferable to free fall. 用推力动作弹奏伸展的大和弦优于自由下落动作。
It was observed that, with a wider orifice, kinematic arching effect vanishes and even free gravity-fall arises. 在大出口情况,结拱不易形成,并出现颗粒自由下落现象。