A1000 kg boat is traveling at 90 km/h when its engine is shut off. the magnitude of the frictional force f → k between boat and water is proportional to the speed v of the boat: fk = 70v, where v is in meters per second and fk is in newtons. find the time required for the boat to slow to 45 km/h.

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