Wed. Mar 19, 2014
Yesterday Physics was brainstorming ideas about how to change the amount of unbalanced force on a system and then measure how that effects acceleration. One group really wanted to “funnel” down the wind from a blowing fan cart. Yesterday’s design looked good but ultimately didn’t help us. The funnel didn’t allow enough air to pass through, most of the air just rebounded off the funnel and back towards the fan. A couple of crude paper funnels worked a little bit, but they found having a funnel really didn’t change anything in terms of the force the cart was experiencing. They scrapped the idea and simplified their approach.
What most groups ended up with was something like this:
Some decided to alter the mass of the cart and keep the fan speed the same. Others are holding the mass constant and altering the speed of the fans. To do this I have the fortune of having these sweet Fan Carts from Pasco: