in a month, i give a presentation about an experiment in which two objects of different mass are dropped at the same time and hit the ground at once. I am asked for a verbal and mathematical model for this experiment. Here goes my verbal model: "While mass does affect an objects weight, it does not play a role in determining the rate of fall of an object rather does the gravitational force on the object by the earth." Is this good enough? What should I add/subtract? I am also asked to find a mathematical model but I don't know which equation corresponds with this experiment. It's a constant acceleration equation right? The physics class I'm taking is a level one course in a college in New Jersey so please no complicated answers! :) Oh yeah, and how do I take data from this experiment? I know I'm supposed to record the objects position vs. time but I amsupposed to gather the data from a Quicktime movie on the Internet. It says its at 30fps but how exactly do I analyze the data??? Thanks to all of you!