Will Heavier Objects Fall Faster?

<Tab/>Experimenting with this puzzler provided me with a learning experience I did not expect. I experimented with several solutions. One solution I found was that two identical backpacks would fall at the same rate. Then, I filled one backpack up with books and left the other one empty; to my surprise, they still fell at the same rate. The next solution I tested was with two balloons. First, I dropped two balloons not blown up at the same time; they fell at the same rate. Next, I blew one balloon up a little and left the other one not blown up. I dropped them and this time t…