8/20-8/21/18 Kinematics Intro (Red)

We’ve been doing a lot of introductory stuff, but we finally got going late in the hour on Monday. We went out to the West Lawn and uniformly walked from the sidewalk by the science lot to the sidewalk by Main Street (50 meters). We timed ourselves doing it. Then we uniformly jogged from the sidewalk by Main street to the sidewalk by the science lot. That was about it for Monday. We came back in, I handed out sheet 1.2 and we wrote down our times. The following Screenshots are from Tuesday (8/21/18) The discussions went many different ways in the five classes, but here is what each of the discussions had in common. In other words, here’s the part you are responsible for so far:

: This is just a brief introduction to sig figs. We also call them siggies, significant figures, significant digits and just plain sigs.

: The more significant figures there are, the more accurate your number, but the accuracy comes at a price.

: Fractions can’t be used for measured numbers (or the manipulation of measured numbers). The reason is that you can’t show sig figs with fractions. For instance 22/7 is the fraction for pi which has an infinite number of digits. Obviously, no instrument is that accurate, so you have to “round and truncate” pi to show the proper number of sig figs. We’ll talk about sig figs more later. This is good enough for this first introduction.

: Here is our plot of the first walk from the science lot sidewalk to the main Street sidewalk. It also includes our first Physics equation. THis happens to be from 3rd hour.