Cars are safety tested to see how quickly they come to a stop under many conditions. the distance and time of one of these tests is graphed. what is the change in velocity during the first second? a) 20 m/s eliminate b) 30 m/s c) 0 m/s d) 50 m/s

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