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Now, gravity, well force, is equal to mass times acceleration, g and the acceleration due to gravity is g.
是重力，等于质量乘以加速度，由重力导致的加速度是。
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it's happening. And I think it's happening, I think it's being sped up by humans, by our interaction.
这是一个正在发生的事实，由于人类的活动，这个进程在加速。
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They take an atom of lead, accelerate it and have it collide with an atom of nickel.
他们选取一个铅原子，将其加速,让它与镍的原子碰撞。
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You go on an airplane and then after the usual delays, the plane begins to accelerate down the runway.
你坐上飞机,正常晚点之后,飞机就开始沿着跑道加速
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Once the rumor got started that Asia was in trouble, these people started withdrawing their money faster and faster and it caused failures of domestic banks in these countries.
一时间流言四起,亚洲陷入困境,资金加速流出,这些国家的本土银行纷纷倒闭
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Your heart starts to beat a little faster, your blood starts flowing quicker, and your breath gets shorter.
你的心跳加速，血脉贲张，呼吸也急促起来。
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Of course, more generally, you get excited, your heart goes pitter-pat, when your girlfriend or boyfriend says they love you.
当然,更常见的情况下,在你的爱人说爱你的时候,你会很激动,心跳加速
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OK. This is still boring, so let's step on the accelerator.
好吧，这还是很无聊吧？,让我们打开加速器。
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We can take a particular-- Here I'm conducting in three: one, two, three, one, two, three, one, two, three, one, two, three, one, two, three, and obviously I'm accelerating there.
这里有个例子,我指挥三拍子,一二三,一二三,一二三,一二三,一二三,显然的,我在这里加速了
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You will learn in 8.02 that if you have a charged body changing direction, that constitutes an acceleration.
你们将在8。02中学到,如果一个带电体改变方向时，产生一个加速度。
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So, an energy deficit, accelerating charge, the accelerating negative charge, because it's the negatives that are orbiting the positive center.
能量的损失，加速电荷，加速的负电荷，因为这是负电荷,围绕在正电荷中心的周围。
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Therefore, when you divide by the mass to get the acceleration, the response of different bodies is inverse to the mass.
因此,当你拿力除以质量得到加速度时,不同物体的加速度与质量成反比
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Now, if this incident energy is great enough it will take an electron out of the ground state and promote it.
现在，如果入射能足够的话,它会将一个电子从基态中释放出来,并且加速它。
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So these devices, when I was a youngster, were colloquially known as "atom smashers", because they have the capacity to actually break these and have them reform.
这些设备，当我还年轻的时候，它们在口语中被叫做核粒子加速器，因为它们有能力,将这些破碎并重新形成。
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One is inertial mass, which is how much you hate your velocity to change, how hard you resist acceleration.
一个是惯性质量,它反映了物体速度改变的难易程度,即保持加速度的难易程度
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But the acceleration it produces on the elephant and on the mass, are in an inverse ratio of their masses.
但这个力使大象和物体产生的加速度,与它们的质量成反比
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You cannot have a spring pulled only at one side, because then it will then accelerate with infinite acceleration in that direction.
你不可能对弹簧只施加一边的拉力,因为那样的话弹簧就会以无穷大的加速度加速,就在这个方向上
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These are the three places where they have the accelerators.
这三个地方,拥有加速器。
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Now I can measure that, because I pull it by one centimeter and I find the acceleration it exerts on a known mass.
现在就能测量这个力了,因为把弹簧拉伸 1 厘米,我就知道它让一个质量已知的物体产生的加速度
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Simply knowing the acceleration is not enough to tell you where it was at the initial time.
仅仅知道加速度是,不足以告诉你它在初始时刻的位移的
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So, when you divide by the mass to get the acceleration, you get the same answer.
因此,当等号两边除以质量来求加速度时,结果是相同的
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And, you know acceleration means either change of speed or change of direction.
你知道加速度意味着,不是改变速度就是改变方向。
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A limited class of problems is one in which the acceleration is just a constant.
在这类有限的问题里,加速度均为常数
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But if you go on a plane which is accelerating, you're no longer inertial.
但如果你上了一架加速飞行的飞机,你就不再处于惯性状态了
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As you start on the top and go down, your acceleration is negative.
当你在顶楼准备下降的时候,你的加速度是负的
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What's your plan for measuring acceleration if some little thing is moving?
如果某个小物体在运动,你要如何测量加速度
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Acceleration is the easiest thing to measure of these three quantities.
加速度是这三个量中,最容易测量的
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The first one is velocity, the second one is acceleration.
一阶导数叫速度,二阶导数叫加速度
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But the acceleration is not the same on different objects.
但不同物体产生的加速度是不同的
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But this is the acceleration of the one kilogram mass.
但这是 1 千克物体具有的加速度
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