Second... Newton's Second Law: ma this is the only force in the x direction.

根据牛顿第二定理：,等于。，ma，equals。。。,这是x方向的,唯一一个力。

youdao

When it is at a random position x, there is a force on it and the force is always in the direction opposing the increasing potential energy so the force is clearly in this direction.

当它在随机位置x处，存在一个作用力，这个力一直在，势能增加的，反方向，所以这个力很明显，在这个方向。

youdao

x So if this is x, if you make x three times larger, that restoring force is three times larger.

因此如果这个，如果把x放大三倍，那么回复力,也会变大三倍。

youdao

Lieutenant Colonel Tom McIntyre, X-37B program manager for the Air Force Rapid Capabilities Office, explained the third X-37 flight will not only help the Air Force better evaluate and understand the vehicle's performance characteristics, but this first re-flight is an important step in the program.

ENGADGET: USAF relaunches its first X-37B on a slightly less mysterious spaceflight

Just this morning I turned on my car in the driveway (the car I lent to a 17-year-old African-born youth last night so he could drive with other African-born youths to a Korean take-out chicken place called Mo Betta Wings) and an X-rated hip-hop song blasted with such explosive force from the radio that, for a second, I thought I'd been in an accident.

CNN: I see America's diverse future--in my house

This appears to be the mindset of the Air Force regarding its experimental X-37B space plane, the billion-dollar robotic vehicle's orbital flight being extended beyond the 270 days it was initially designed for.

ENGADGET: Air Force X-37B space plane books additional time on orbital cruise, orders another margarita