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I told you once you know the free parameters, R0 and v0, you know everything about the future of the object.
一旦给定自由参量 R0 和 v0,你就能知道这个物体之后的运动状态
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If you took the derivative of this, you will get the velocity at time t, it would be: v=v0+at.
如果你对它求导,你就可以知道 t 时刻的速度,即,v=v0+at
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If you do that, you will find there is one unknown, which is v0, and we can solve for v0.
这样就只剩下一个未知量了,也就是 v0,我们就能解出 v0
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If you solve for that, you find y-y0=v0^/, and if you put in the v_0 I gave you, which was what, 10?
如果你解这个式子,你会得到y-y0=v0^/,如果再把我给你的v0代入,那个数是多少 10
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You know that if you took a derivative of this, you will find v of t is v0+at.
如果你对这个式子求一次导,你将会得到v=v0+at
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Then, you can then understand that v is what b is, which we write as v0.
然后你现在就可以知道,v就是系数b,我们记作v0
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I tell you the initial velocity v0, I tell you at what angle I fire it.
我会告诉你们初速度 v0,以及我以多大角度射出
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So what are these two other numbers, x0 and v0 and x-not and v-not?
那么这另外两个量是多少,x0 和 v0
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For the x part, I'm going to write x = x0 + v0 t.
对于 x 分量,有 x = x0 + v0 ? t.
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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
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Car is traveling with some initial speed v0 in the horizontal direction.
车以 v0 的初速度沿水平方向开出
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What happens is, you will find that v^=v0^+2a times .
结果就是v^=v0^+2a
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Therefore, you say 0^=v0^-2g, that's my acceleration, times .
因此 你得到0^=v0^-2g,这里是加速度,再乘以
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The time, in fact, is v-v0 over a.
实际上,运动时间为/a
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It's got a fixed speed v0.
炮弹有个恒定的速度 v0
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