So yes, f is a float, but that solution is too late; we need to fix the problem sooner.

是的，f是一个浮点数，但是那个解决方案太迟了;,我们应该在次之前把问题解决。

哈佛公开课 - 计算机科学课程节选

Your problem is to only look at the forces of contact on you, and that is just this f.

你只需要注意那些直接作用在这个物体上的力,那就只有 f 了

耶鲁公开课 - 基础物理课程节选

So we've seen a lot of this, for instance, in office hours and maybe you too have done or are currently doing this, but there's a problem with writing a statement, like print F, followed by, get int, alone.

我们看过很多这个，例如，在办公时间,可能你们做完了或还在做这个，但是写语句的时候有个问题，就像printf，紧跟着的是GetInt，单独的。

哈佛公开课 - 计算机科学课程节选

Newton says F = ma, so to make it a useful result of this problem, we know the mass of this guy.

牛顿指出 F = ma,这对于解决这个问题很有用,我们知道这个物体的质量

耶鲁公开课 - 基础物理课程节选

We did the comparison with the elephant or something; a is the second derivative of x and for this problem, when F is due to a spring, we know the force is that by studying the spring.

我们也已经把它与大象或其它东西作过比较,a 是 x 的二阶导数,在这个问题中,F 是由弹簧产生的,我们在讨论弹簧问题时已经知道了力的大小

耶鲁公开课 - 基础物理课程节选