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Mathematics 12 Online
OpenStudy (anonymous):

Consider a locomotive and the rest of a freight train to be a single object. Suppose the locomotive is pulling the train up a hill. Describe the action and reaction forces that cause the locomotive to move up the hill, such as the reaction force and gravity. **Please explain? Thanks!!:)

OpenStudy (phi):

something like this |dw:1416615101992:dw|

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