A 100 car train is pulled by a 200T locomotive. Assume that the cars are all identical and weigh 100T each. The train accelerates from 0 - 10m/s in 200s, and we ignore friction and air resistance. Roughly sketch this train as a single object (you don't have to sketch all 100 cars). - What is the mass of the entire train (in Tonnes and kg)? - What is the train's acceleration in m/s^2? - What is the (tractive) Force supplied against the rails by the locomotive in N and kN to accelerate the train?

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!