Before trying to sound intelligent why dont you study a bit of how an object interacts with gravity, momentum and energy? How about a wiki on Newton's laws....
What you are refering as "heavy" is, in reality, a commun mistake. Objects have a mass and when subject to aceleration they move. Thus we can conclude that with bigger objects (more mass, like an ARMORED airplane) the aceleration used, to move it is proportionaly bigger and more dificult to alter its trayectory, bla bla bla.
You are a moron.