Mass! That's a cool nickname.'Cause force equals mass times acceleration.

质量 好酷的外号 力等于质量乘以加速度。

Well, force is equal to mass times acceleration.

力等於质量乘以加速度。

You have force is equal to mass times acceleration.

这个力，也就是平行於斜面的这个地心引力的分力。

One of the basic equations of physics is" Force equals mass times acceleration" , or deceleration.

物理学的基本方程之一是“力等于质量乘以加速度”，或者说减速。

Mass times acceleration is just what the net force happens to equal.

质量乘以加速度恰好等于合力。

But a change of velocity over time is just an acceleration, and mass times acceleration is equal to the force on the object.

质量乘以加速度等于施加在物体上的力那么 物体动能随时间的改变量就是速度乘以力。

From Newton’s second law of motion, we know that a net force is equal to mass times acceleration.

根据牛顿第二运动定律， 我们知道合力等于质量乘以加速度。

From Newton's second law of motion, we know that a net force is equal to mass times acceleration.

根据牛顿第二运动定律，我们知道结果 力等于质量和加速度的乘积。

And if you were to calculate that derivative, you’d find that the net force is just equal to mass times acceleration.

如果你要计算这个导数， 你会发现净力正好等于质量乘以加速度。

And if you were to calculate that derivative, you'd find that the net force is just equal to mass times acceleration.

如果你计算那个导数，你会发现结果 力等于质量乘以加速度。

Running speed depends on how much force is exerted by the runner's legs, and according to Newton's Second Law of Motion, force is the product of mass times acceleration.

跑步的速度取决于跑步者的腿部力量。根据牛顿第二运动定律，力的大小等于质量乘以加速度。