1.Why is it that North and West London are well served by the London underground railway system whereas South East London isn’t? Describe how the engineering problem responsible for this was overcome to construct the Second Blackwall Tunnel in the 1960’s
2.Question: The subway train is traveling at a speed of 54 km/hrwhen the brakes are fully applied on the wheels of cars B and C,causing them to slide on the track, but are not applied on car A.μ of kinetic friction= 0.35.
Mass A: 35 Mg
Mass B: 45 Mg
Mass C: 35 Mg
What is the distance required to bring the train to a stop?(v=0 m/s)