I recommend you start thinking what is the difference between force and energy. If you don't have the theory it's easy for our brain to think for
example that we save energy by using levers or gears, in fact we don't. It's a kind of subconscious bias that may seem illogical at first. Riding
distance x with a lossless bicycle with gear 1 takes exactly as much energy as driving it with gear 3. Easier gear needs less constant force but it is
slower. Similarly in lever having coins closer to to the center requires less force to move them but the distance they move is shorter.
It's good that you are learning science, building stuff is good way to learn, just keep some books around while you are doing it so that if you fail,
you understand why.
edit on 25-5-2012 by redbore because: (no reason given)
edit on 25-5-2012 by redbore because: (no reason
given)
edit on 25-5-2012 by redbore because: (no reason given)