The subway train shown is traveling at a speed of 30 mi/h when the brakes are fully applied on the wheels of cars A, causing it to slide on the track, but are not applied on the wheels of cars A or B. Knowing that the coefficient of kinetic friction is 0.35 between the wheels and the track,

Determine
(a) The distance required to bring the train to a stop,
(b) The force in each coupling.

Transcribed Image Text:

30 mivh 40 tons 50 tons 40 tons