10/7 Eroglu

       Walking into Physics in the morning I noticed that it said to check "1st Quarter Honors Physics Review Problems". I'd completed the final word problems of a POGIL as well and was extatic to learn that we weren't going to turn it in. Coats-Haan passed the answer keys to the review problems out, as she has for every checked homework assignment. Problem number 5 included mass, something I had never seen before in this Honors Physics class. To find out that I had, in fact, correctly worked through this problem was very rewarding although as I'd found out the night before, mass was really not a factor in this problem.
        Coats-Haan directly stated that we had a large amount to accomplish during class and that we only had time to go over two problems. After this, she set out to explain the the "Acceleration of Gravity" lab. To do this lab, my group was told to move to another table because our regular table doesn't give us access to an outlet. In the lab, we were to measure distances, calculate average velocity for intervals of time, and plot this average velocity on a graph of velocity vs. time; moreover, the graph would enable us to determine the accelearation due to gravity. Of course we already know that this is -9.8meters/second squared.
         To do this, we plugged the timer in and placed the timer at the edge of our table. We then thread a 1.5 m strip of paper throught the slot on the timer. We had to arrange the materials so that when the timer vibrated, the striker would hit a carbon paper disk with the paper strip underneath it. Because of this, a dot was marked on the strip of paper each time the timer struck the carbon paper. The dots were separated by a distance equal to the distance which the strip moved in one time interval.
         To cause the strip to move through the timer, we attached a 1-kg mass to the end of the paper strip. Chris turned the timer on and Kyle released the mass. Once the mass hit the floor, Chris turned the timer off. Jack removed the strip from the mechanism and we noticed that the motion of mass was recorded through dots. Looking at the dots, we notice where increased separation first became obvious and numbered that dot zero.
          We numbered all dots after that one until 17. We then made a data table with the dot number, position, change in position(cm), time interval(sec), and average velocity(m/sec). To answer the question "How can you tell when the weight was moving the fastest by looking at the ticker tape timer?" I say that ,because the time interval is always 1/60 sec, the bigger the change in position of the dots is, the higher the average velocity. In response to the question, "How are you going to calculate accleration in this lab?" the average velocity and time interval will be graphed in a velocity vs. time graph. Two points will be marked on a line drawn through the data on the table. The change in velocity/the change in time will yield acceleration due to gravity. The homework is to do page 54 #s 30,31,33,47,49,51,77,78. The "Acceleration of Gravity" lab report is due on 10/12.