I can measure that, because I pull it by one centimeter and I find the acceleration it exerts on a known mass.
我可以测量它了，因为我把它拉到了一厘米，我发现它对一个已知质量施加的加速度。
Acceleration to 60 mph takes a mere 5.7 seconds.
加速到每小时60英里仅用5.7秒。
In an electric car, for example, an ultracapacitor could provide the power needed for acceleration, while a battery provides range and recharges the ultracap between surges.
比如电动车，超级电容可以提供加速所需的电力，而电池提供行程所需能量，并在电涌间隙为超级电容反复充电。
There is a requirement that there is a centripetal acceleration, which is in this direction, a centripetal.
前提要求就是，具有向心加速度，朝这个方向，向心力的作用。
The best way to estimate the safety of a landing is to look at the acceleration.
判断落地时安全与否的最佳方法就是计算落地时的加速度。
And, in fact, there is a sideways acceleration at that point even though the speed is not changing.
事实上在那一点存在一个侧向的加速度，即使它的速率没改变。
When we have gravity an object is influenced by the gravitational acceleration and the gravitational acceleration is a constant.
当我们考虑到重力时，物体受重力，加速度影响，重力加速度，是一个常数。
That means there must be a huge acceleration.
意味着有一个巨大的加速度。
Called Distronic, it also operates at high speed and adjusts both braking and acceleration to maintain a constant distance from other cars.
这种系统在高速行驶时也起作用，通过调整制动和加速系统来保持同其他车辆的距离。
Any missions hoping to go farther will need a means of acceleration that can get the spacecraft to the edge of explored space faster—before it has depleted its radioactive power source.
故而，任何更深空的宇宙探索都需要寻找技术途径来加速航天器，以便在放射性能源耗尽之前到达星系边缘。
What is the acceleration as a function of time?
加速度是,如何表示时间的？
It's a very modest acceleration.
一个很小的加速度。
So, the definition will take effect. The acceleration is as a vector, and the acceleration vector is just the derivative of a velocity vector.
有必要对加速度给出一个严格的定义，加速度,作为一个矢量,是速度的一阶导数。
And if there is a torque, there's going to be an angular acceleration.
如果存在一个力矩，就会产生一个，角加速度。
Still unknown: whether an electronic problem is also a culprit in sudden acceleration.
是否电子设备的问题也引起了突然加速的问题呢？ 这还至今未得到答案。
Ten times further away, the gravitational acceleration is down by a factor of 100.
远上十倍，重力加速度，就会减少100倍。
In the last few years, though, there has been a notable acceleration in how often such books appear.
不过，在最近几年，此类书籍的出现明显加速。
If I have a huge spring force, the acceleration on a given mass will be high.
若弹力巨大，那么在物体上的，加速度就大。
Velocity is a vector and acceleration is a vector and today we're going to learn how to work with these vectors.
速度是个矢量，加速度也是个矢量，今天要来学学，如何处理矢量。
Now let's accelerate this system upwards a with an acceleration a-- and I call this plus.
下面将系统,向上加速-,规定这个是正方向。
Last time we discussed that an acceleration is caused by a push or by a pull.
我们在上节课讲了推力和拉力，可产生加速度。
What is the acceleration "a" of the system?
那么系统的加速度a是多少呢？
Now I would like to calculate with you the acceleration that a cylinder would obtain.
现在我将和你们一起，计算圆柱会获得的加速度。
By itself, this breakup was not dramatic, but it continued a pattern of calving and retreat followed by ice flow acceleration that began nearly a decade ago.
就其本身而言，这次崩裂并不突然，而是始于大约十年前的一个持续的由冰流加速引起的崩离与消退的模式。
Do not confuse ever the tangential acceleration, which is along the circumference, with a centripetal acceleration.
但是别把这个切向加速度，它是沿着圆周的，和向心加速度混淆。
In a sprint race, acceleration off the block is everything.
短跑比赛中，从起跑器上加速至关重要。
It has changed from a minus sign to a plus sign because of this positive acceleration.
速度的符号已经，由负变正了，可是加速度又还是正的。
It has changed from a minus sign to a plus sign because of this positive acceleration.
速度的符号已经，由负变正了，可是加速度又还是正的。
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