So, speed, which is the scalar quantity is going to be just the magnitude of the vector, V.

因此，速度的大小即是,矢量V的模长。

youdao

But now notice, I can substitute now for this v squared, I can substitute the square of this that is the orbital speed and then I get M G over R.

现在注意我能,代替这个v平方，我能代入这个平方,那是轨道速度,然后得到MG在R上。

youdao

Out pops that speed with which you can escape the gravitational pull of capital M, which is the V square root of two times larger than this V.

逃离M的重力,所需的速度为,√2乘以,比逃逸速度小的。

youdao

If you want to find the speed there, you put the equation v^=v0^-2g.

如果你想求出那一点的速度,可利用方程v^=v0^-2g

耶鲁公开课 - 基础物理课程节选

Whenever you see a particle moving in a circle, even if it's at a constant speed, it has an acceleration, v square over r directed towards the center.

只要看到质点做圆周运动,即使是匀速圆周运动,也存在一个加速度,大小为 v^2 / r,方向指向圆心

耶鲁公开课 - 基础物理课程节选

The 10 episode season one of Sense8 marks the first foray into television by the Wachowskis, the creative geniuses behind Bound, The Matrix, The Matrix Reloaded, The Matrix Revolutions, V for Vendetta, Speed Racer and Cloud Atlas, and is the latest project from veteran show runner J.

ENGADGET: Netflix signs up The Matrix, Babylon 5 creators to develop a new sci-fi series: Sense8

Due in late 2014, it's being developed by the Wachowskis of The Matrix, V for Vendetta, Cloud Atlas and Speed Racer fame, as well as J.

ENGADGET

Due in late 2014, it's being developed by the Wachowskis of The Matrix, V for Vendetta, Cloud Atlas and Speed Race fame, as well as J.

ENGADGET