11/10 Back

As I walked into Honors Physics for second period on November 10, 2011, I checked the all-knowing white board to find out where my homework from the previous night was to be placed. It instructed me to turn page 73-74 from the lab manual, which I did in the blue second period folder. Next on the board was to check the problems (we never do the questions) from page 127 in our textbook. We had been assigned to complete problems one through nine. After a short questioning session on the assignment, CH had our class take additional notes on Newton's 2nd Law of Motion. Well, actually, there were no extra notes. However, CH pointed out, we did have two problems from the example sheet to work out. After discovering how to be FOXY in physics (we learned by examining three forces that were acting on an object and applying ROXY with forces),) CH gave us a pair check to complete with our lab partners. It was a momentous occasion, being the first pair check since the infamous seat change (FSD4L!) As we worked our way through the pair check, which turned out to be pretty simple, CH handed back our quarter tests. As my table members and I rifled through our tests, however, we could not figure out why we had gotten two questions wrong. I brought the two questions to CH, and she decided that we were right, her key was wrong, and we all deserved two extra points on our exam grades. After the discovery of these mistakes, we began to work on our homework, the problems 10-17 on page 127 in the textbook. We all promised CH to actually do the homework and not just turn in the old homework with altered numbers.


QOD: If you have several forces acting in multiple directions on an object, how do you determine the object's acceleration?
In order to determine the objects acceleration, you set up a ROXY table. However, you must replace the R with an F, for force. Then, you proceed as if the table used ROXY. You add the separate x and y components and then use the Pythagorean Theorem to find the magnitude of the acceleration. You then take the inverse tangent of the two components to find the angle at which the acceleration lies.