To pull apart two pieces of wood, you can apply a force of 50 N to a lever. The lever applies a force of 640 N. What is the mechanical advantage of the lever?
A.13
B.17
C.0.08
D.32,000

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