Is this a complete circuit in steady state?
If so, then the current going through both bulbs is the same, I, since the bulbs are in series. Again since the bulbs are in series, you can add the resistances and get an equivalent resistance. From this we see that the voltage drop across the...
Since the question asks you to
and states
you can use either the constant acceleration formulas both you and EinsteinKillr stated, or the energy formula you stated. Both will work in this case. The important thing to realize here, is that they are asking for the height above the end of...