Superman must stop a 120-km/h train in 150 m to keepit
Chapter 4, Problem 4.5(choose chapter or problem)
Superman must stop a 120-km/h train in 150 m to keepit from hitting a stalled car on the tracks. If the trains massis 3.6 X 105 kg, how much force must he exert? Compare tothe weight of the train (give as %). How much force does thetrain exert on Superman?
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