9. A spring with a constant of 250 N/m is compressed .73 meters. The spring is sitting parallel to a frictionless tabletop with a 1.5 kg block of wood pushed into it at point A. What will be the maximum speed of the block of wood at point B when the spring is allowed to spring?
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0 66.6 m/s
O 9.4 m/s
O 21.2 m/s

I’ve been stuck on this for a while

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

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?