Take the difference of the two velocities and divide by the difference of the two times, and you've got the acceleration.
求出速度的差值,除以时间的差值,这样就能得到加速度
This is the starting speed, that's the rate at which it is gaining velocity, and that's how long it's been gaining it.
这是起始时的速度,这是速度的增长速率,这是加速的时间
Their difference divided by the difference in times is going to be the acceleration.
它们的差值再除以时间的差值,就是加速度
The acceleration gives you an extra stuff, quadratic in time.
加速度对位移有额外贡献,是时间的二次项
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