The figure below shows 4 movements. Each drop, regardless of its color, drops at the same rate, 1 drop per second. Each vertical line marks one meter. The first line is at 0 meters and the last line is at 21 meters. Let's put all this information in one graph of position (y axis) as a function of time (x axis).

1) What is the difference between red and green?
2) What is similar between red and green?
3) What is the difference between violet and blue?
4) What is similar between violet and blue?

5) Compare what you obtained (the shape of the curves) with what you see on http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/kinema/pvpa.html