A city bus accelerates away from a bus stop at the acceleration shown. At the next stop, a tourist boards the bus with 1,000-kg of recording equipment, and when the bus driver starts going again, he notices he has to press harder on the gas pedal to maintain the same acceleration.

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