论文部分内容阅读
在电视中,我们看到宇航员在月球上行走和在地球上行走有很大的不同,宇航员在月球上是跳着行走的,为什么会如此行走,下面我们对这一问题作定量分析。宇航员这样行走,主要是由于月球表面引力减小的缘故。当人在月球上和地球上步行时,脚总要用力向后蹬地,同时地面对人产生向前的反作用力,使人向前运动,近似地,人体的重心运动可看成是水平方向的匀速运动和竖直方向的匀加速运动的合运动。
On television, we see that astronauts walking on the moon and walking on the earth are very different. The astronauts are walking on the moon and why they walk. Here we quantify this issue. Astronauts walk this way mainly because of the reduced surface gravity of the moon. When a person is walking on the moon and on the earth, the foot is always forced to slam backwards, and at the same time, the person has a forward reaction force to face the person so that the person moves forward. Approximately, the center of gravity of the human body can be seen as horizontal. The uniform motion in the direction and the uniform motion in the vertical direction.