Physics 11 – What does a coffee maker have to do with an elevator lab? Absolutely nothing, but it’s still very important. I got a new coffee making device for Christmas, called the Clever. It’s not that much different from ye old Melitta system. You slap a Melitta filter in the cone, add some fresh ground coffee and pour in hot water. The Clever does not let water through the bottom until it is placed on a cup though, so the coffee goes through an immersion before filtering. The Clever is half pour over, half French press. I was interested in it because I use a hand grinder and it’s easier if I do a course grind, which is what you use for a French press and Clever. However, unlike the French press, the filter removes all small sediment and particles from the coffee so that you end up with a clean crisp cup of Joe.
The class watched a video of a person standing on a scale while riding in an elevator. The video was focused on the scale readout. Students had to work out the person’s weight and normal forces acting on them, and draw force diagrams corresponding to when the person was still, moving at constant velocity and accelerating. It was challenging for them but very thought provoking and useful.