For parts (i) - (iv) of Problem 1, consider a freight train of mass 10' kg initially traveling at 130 km/hr. 1. ii. iii. Ignoring friction, how tall of a hill would this freight train have to climb to come to a full stop? If the train were instead a typical car moving at the same speed, how would the size of the required hill change? Again, ignoring friction. a. You could use a smaller hill to stop the car. b. You would need a larger hill to stop the car. c. The same size hill would be needed to stop the car. d. Need more information about the car. As an engineer for a major shipping and distribution company, you are asked to design a brake system for the train described above. The brake system should be able to bring the train moving at 130 km/hr to a complete stop within 1 mile of track. If the train remains at the same elevation throughout the braking process, what is the average brake force required to completely stop the train. Continue to ignore friction in your analysis. a. 4.1 MN b. 4.1 kN c. 1.1 kN iv. d. 1.1 MN A real train will experience friction between the wheels and the track, and the air (i.e., drag). How would including these effects in your analysis alter your calculation of the required average break force, assuming all else remains the same? Assume the train is moving into a headwind. a. The average brake force would increase. b. The average brake force would decrease. c. The average brake force would remain the same. d. Need more information about the friction and drag coefficients.