I wrap this rope around here several times, and here I hang an object m which is substantially less in mass, m which is m, little m, mg and the tension equals mg.

我把绳子绕上几圈，这里挂一个物体，它的重量远小于，它的重量是，张力等于。

youdao

M the object has a mass m, mg and so there is a force mg, and I can write down the force in vector notation.

物体质量为，因此有重力，我可以用向量符号，表示这个力。

youdao

This is minus one over r, so I get m MG over r with a minus sign, and that has to be evaluated between infinity and capital R.

这是r的负值，所以在mMG/r上加-号，它处于,无穷远和R之间。

youdao

I know this is the right answer, because if I now find the acceleration, I find it's mg divided by m and I get -g as the answer for all bodies.

我知道这个等式是正确的,因为现在如果我要求物体的加速度,用 mg 除以 m,我就得到 -g,这个结果对所有物体都成立

耶鲁公开课 - 基础物理课程节选

Welch MG, Welch-Horan TB, Anwar M, Anwar N, Ludwig RJ, Ruggiero DA. Brain effects of chronic IBD in areas abnormal in autism and treatment by single neuropeptides secretin and oxytocin.

FORBES: Anti-Vaccine Activists Apparently Immune To Science

There have, since then, been some discussions (most notably by Technologizer and MG Siegler himself) about the seeming decline in the quality of some of the comments -- but I'm going to leave that aside for the moment, and talk about the larger issue in all of this that interests me far more.

ENGADGET: Editorial: Facebook, single identities, and the right to be anonymous