It is a space rock captured and now held in orbit by the gravity force of Mars.
它只是星际空间的一块巖体,受火星引力作用而被吸引住,并沿着轨道环绕火星运动。
The tests were conducted before and after the mass of the model was augmented with iron ballast. to meet the similitude requirements for gravity force and mass c…
At the same time the processing error of the workpiece caused by the bending of the ball screw for the gravity force was analyzed when the workpiece is...
同时在加工精密工件时,就自重原因引起丝杠弯曲导致的加工工件的误差进行了分析。
Newton proved his idea by measuring how much gravity force would be needed to keep the moon orbiting the Earth. Then he measured the mass of the Earth and the moon, and the distance between them.