来自《耶鲁大学开放课程：基础物理 第4集 第4集》
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So, static friction is a force所以静摩擦力是一个这样的力 -
which has a range from 0 to some maximum.它的大小可以从零一直变化到某一最大值 -
So, let's call it the force of friction所以我们所说的摩擦力 -
is less than or equal to some maximum.小于或等于某一个最大值 -
And that maximum turns out to be这个最大值等于 -
a number called the coefficient of static friction静摩擦系数 -
times the normal force.乘以法向力 -
The force of friction seems to depend on摩擦力的大小看起来取决于 -
how much normal force the table is exerting on the object,桌子对这个物体施加了多大的法向力 -
which in our example,在我们的例子中 -
if you want in our example,如果你想在我们的例子中 -
not always, this is always true,这并不总是一直是对的