1-27-09

[|physicspicture.doc] By Liz Chever **
 * Physics Journal

Today, January 27, 2009, we had a substitute teacher in place of Mr. Manning. This was the first day of the second semester. We all were seated, and the agenda was very simple. He had us go back and rework our daily questions we had from yesterday. The reason we were supposed to rework those problems is because we now have a better understanding of work and how to solve problems. We spent about five to ten minutes on that activity, and then we were instructed to give the sheet to the teacher. Lastly, we picked up two worksheets, "The 10 Most Missed Midterm Exam Multiple Choice Questions" and "Work and Power Worksheet", which was page 6 and 7 in our notebooks. We were allowed to work with one other person, and the goal was to get these two worksheets finished. The midterm worksheet was to give us a second look at some problems on the test, and to explain how we got the answer. Since we had another person to work with, it was easy to see some of our mistakes. The other worksheet dealt with mathematical problems and working with the equations. Question 2 dealt with a graph to interpret the work done. This worksheet also included questions on power as well. If we didn't finish these two worksheets by the end of class, they were for homework tonight.


 * The picture is shown and linked above, showing an example of the problems we worked on today with our worksheets. We solved work and power problems with the equations. Work equation is F x the change in position or F x the change in position x cos of an angle. Power is work divided by time. Work's units are N x m, and power's units is Joules.