Tuesday, May 8, 2012
Surfing For A Car Moving At 50?
Susan asks…A railroad train consisting of 2 locomotives at the head of the train and 50 cars moves along a straight...?... level track at a constant speed. Both locomotives deliver the same power. Each car exerts the same drag. Which coupling in the entire train is subjected to the greatest stress?Nancy answers:The coupling behind the second engine and before the first car.Nancy asks…A 960 kg car is moving at 75 km/h. How much work must be done to slow the car from 75 km/h to 50
