If P represents the pull of the wagon on the horse and the horse on the wagon, f represents the frictional force between the wagon wheels and the ground, and F represents the reaction force of the horse pushing against the ground, then the net force that accelerates the system is equal to

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