So we generate a torque which is proportional to the Angle, very similar to the linear spring whereby we generate a force which is proportional to the linear displacement.
所以产生一个力矩，和这个角成比例，就像线性弹簧，中产生的力矩和，线位移成比例。
2
That is a little bit of work that I'm doing, right? I have a force which is constant during a short, small displacement.
那是我做的一点功，对吗，我有一个恒力，是在短小的位移。
3
Experimental fact - that many springs — - we call them ideal springs — for many springs, this force is proportional to the displacement, x.