Difference Between Newton and Einstein

[nhmllr]

I was watching a lecture by Walter Lewin, when he started talking about the radius of an event horizon and the mass of its black hole. I was confused, because I thought that black holes were relativistic things. But then I realized that special relativity deals with things moving at velocities, and general relativity is "derived" from it.

So: If things are traveling at velocity 0, then are Newton's laws of gravity 100% accurate when predicting forces?

Thanks

 

[Matterwave]

General Relativity is not "derived" from SR, in fact, SR is a special case of GR. If things are not moving very fast, and in places without much curvature (e.g. far away from the mass, or for masses which are not very compact), then Newton's laws are approximately accurate. GR is accurate in general.