In Physics 101, we use a model for falling objects that assumes gravity is the only force present [the free fall model). Since the acceleration due to gravity is constant, this model allows us to use the equation 1 yr: 1/? + vtm+ 233121 to study the fall of an object. For an object that is dropped from rest, this simplifies to _ 1 Mr 5355 where by is the distance the object falls and g= -9.81mfsz. In today's experiment, you will study the fall of an object where you cannot assume gravity is the only force acting on its fall. The object, a plastic bag with a clip attached to it, is also affected by air resistance, or "drag." As an object falls, the drag force opposes its motion, causing it to fall less quickly. The effect of the drag starts out small, but increases as the speed of the object increases. At low enough drop heights the free fall model is appropriate to describe the fall. As the effect of drag increases the free fall model becomes less and less good at predicting the fall time for a given height. This is shown in the gure below. - - - Freefall prediction Results with drag I Distance offall \\ \\ Time spent falling