Applied Physics – Week 3

This week we looked at classical physics. But, we started by reviewing the topic of modeling from the previous week. Using the skills we gained in interpreting and working with models we looked at a rather complex model: the model of cosmology and the big bang. This acted as a looking glass of sorts, to show the students what we will be working on in more detail down the road. After this we jumped into the main topic: classical physics. We first defined “classical" as a group, discussing what it means from the perspective of a historical physicist. How is “classical" physics different from “modern" physics? We briefly peaked at this complex question, and will often peak at it throughout the course.

With classical physics comes Newton. We overviewed his work with emphasis on three topics: His three laws of motion, optics, and calculus. Using the students developed model interpreting skills we examined optics diagrams, and the students deduced the behavior being represented. This allowed them to get some hands on experience with both how light behaves, and model interpretation. Next, showing the students what calculus is, and how it works is a wonderful way to introduce mathematics in physics. We discussed how mathematics can allow us to deduce physical reality such as position, velocity, and acceleration. With this in mind we moved to the other main topic, that of the three laws of motion. After briefly examining these laws in their original form we set off on an experiment into the realm of physical motion. With a variety of tools, the students were set to examine common motions, such as dominos falling, or ropes swinging, and explain them in terms of the three laws. After a lot of falling bits and pieces, and a lot of fun I might add, the students offered their chosen motions physical explanation. All walking away with a firmer understanding of these theoretical ideas.