That's exactly right, y0 because then the distance R between here and the y zero is R, so this is the potential energy as a function of angle theta.

它非常正确，因为这样，这里和,的距离是，因此这是势能,关于θ的变化。

youdao

Even at=0, and it has an initial velocity, so even without any acceleration, it will be moving from y0 to y0+vt.

即使at=0,它仍然有初速度,因此即使加速度为0,它也会从y0运动到y0+vt

耶鲁公开课 - 基础物理课程节选

If you solve for that, you find y-y0=v0^/, and if you put in the v_0 I gave you, which was what, 10?

如果你解这个式子,你会得到y-y0=v0^/,如果再把我给你的v0代入,那个数是多少 10

耶鲁公开课 - 基础物理课程节选

If you call that your origin, your y0 will be 0, but ground will be called -15.

如果你取楼顶为原点,你的y0就等于0,但是地面就要标记为-15

耶鲁公开课 - 基础物理课程节选