A hobo of mass m1 stands on a railway flatcar with mass m2. Both hobo and car are initially at rest, the flatcar is on a frictionless, horizontal track. If the hobo runs to the end of the flatcar and jumps off with a speed of vh with respect to the flatcar, how fast will the flatcar be moving after the jump with respect to the track?

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A hobo of mass m1 stands on a railway flatcar with mass m2. Both hobo and car are initially at rest, the flatcar is on a frictionless, horizontal track. If the hobo runs to the end of the flatcar and jumps off with a speed of vh with respect to the flatcar, how fast will the flatcar be moving after the jump with respect to the track?

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