Then the spring force on each one of them — - if I call that the spring force — will only have to be half to counter this force.

它们各自受到的弹力-，如果我称之为弹力-，将只会是，这个力的一半。

youdao

And so the total force on the system is simply the total force external.

作用于系统的合力是，所有的外力。

youdao

And so the total force on the system is simply the total force external.

作用于系统的合力是，所有的外力。

youdao