Recent content by silvanet

I see in the description of non-uniform circular motion in a textbook, referring to a ferris wheel, that the velocity of an object at the bottom must be twice the velocity at the top, but it is not mathematically shown and it is not immediately obvious to me. Can someone show a simple...

I often read or hear people making a big deal that we speed along on the surface of the Earth at about 1,000 miles an hour - well, at least on the equator. In Miami, were only "speeding" along at about 900 mph; in Chicago, they're slower, only around 775 mph; and in Anchorage, even slower, only...