title: libGDX gravity and constant acceleration doesn't work properly
body: <p>I am trying to create a simple Flappy Bird clone but in my own way ( so it's not a complete clone ).</p>
  
  <p>However I am having problems applying a constant downwards acceleration to the Bird. When I create a World it says that it gets a gravity variable but that's not gravity I think ? It should say something like velocity because that is all it does. My Bird is falling downwards at a constant speed. And I believe most of you know how gravity works. When I use functions like applyForceTo I basically get the same. </p>
  
  <p>I have already my own simple implementation of gravity but I wanna use libGDX to its fullest and practice with it.</p>