so i am getting started in cycling and dont really have anyone to bounce ideas off of yet...

OK so here are a couple of questions:

If your body only has so much energy for exertion available and an increase in speed is an exponential increase in wind drag then wouldnt it be most efficient to exert the most energy in climbs because you are going slower hence a more efficient use of energy available? so its better to hit hills harder and downhill not so hard in the general sense?

I dont really understand power vs position - if you are on the bars then more power is available then in the drops? So if you have a strong wind on your back like your doing 20mph and cant feel much wind resistance... then you should be on the bars to increase power and maximize the wind hitting you in the back?