Free-fall and a Ping Pong Ball

Journal 2: Recently, learning about free fall acceleration, I grabbed a ping pong ball and demonstrated this concept at home by simply dropping a ping pong ball.  "Free-fall is the rate of acceleration due to the force of gravity."  Ideally, in a vacuum, this acceleration would be exactly negative 9.8m/s but taking air resistance into account, the free-fall acceleration of the ping pong ball is a little less than that.  The acceleration of the ball and all objects is stated as a -9.8m/s when dealing with free-fall due to the downwards direction of the falling object.  Free-fall also applies to objects that are thrown up into the air.  These objects (assuming they will come down, hence excluding balloons etc.) may have a positive velocity but their decreasing acceleration as the object slows down to gravity will always be around -9.8m/s when they come falling back to earth (ignoring air resistance).  Free-fall can be seen in action with jugglers and any object that can be thrown into the air or dropped down (again ignoring air resistance).  Sorry, not much else here for free-fall, its pretty clear and clean cut, oh except that question on page three of the test. That was a crazy free-fall question. You all should know what I'm talking about... I hope everyone took the test.  Ok, that's all and just a reminder, all of you, do your journals!