A railroad engine coasting at 10 km/h runs into a stationary wagon. The engine weighs 5 times as much as the wagon. Assuming both of them couple together, how fast are they moving after the collision? Solve the problem and show all work.

The field lines around one end of a bar magnet are shown below based on the diagram, what can you conclude about the pole of the magnet? a.is a south pole because the field hnes spread out from this end b.a north pole because the field lines spread out from this end c.a nouth pole because the field lines enter the magnet at this end d.is a north pole because the field lines enter the magnet at this end