littlejohnk

3 ms·

1. 1.▲
   by littlejohnk 11y ago

   Why would the wheel rims rotate at twice the speed of the train? If the train advanced along the track 1m, surely the part of the wheel in contact with the track must also have moved 1m?
2. 2.▲
   by littlejohnk 11y ago

   "where you just drive up" So clearly an American. I walk up to train stations, not drive.
3. 3.▲
   by littlejohnk 11y ago

   "the wheel rims were close to supersonic" This doesn't make any sense. The record is around 575 km/h. The speed of sound is 1225km/h. How would the wheel rim be travelling faster than the train? The while rim rotate