But it's a notion that's complicated in this case by the equally imperative notion "get out of the way," which doesn't at all necessarily entail stopping but rather accelerating in a different direction.
但是值得注意,这很复杂,正如红灯有时表示别挡路,它也不是从来都只表示停止,有时也表示向相反方向前进。
But it doesn't tell you, this is the direction that the reaction is going to go.
但是它们不能告诉你,过程是否会沿着这个或者那个方向进行。
The fact that you don't need a force for it to move forever at a given speed in a given direction, that's not obvious, because in daily life you don't see that.
对于物体不需要力的作用就能保持,确定的速度和方向持续运动这一事实,它并非显而易见,因为在日常生活中你看不到这种情况
But it doesn't tell you, by itself, which direction things run in.
但是这些物理量并不能告诉我们,反应朝着那个方向进行。
the ropes will be pulling the block with T in the other direction, then I got 10 Newtons here.
绳子也会对另一物体施加方向相反的拉力 T,于是我知道这里是 10 牛顿
应用推荐