Tuesday October 6th Physics Class

In class today we started off by getting a few handouts. We got the chapter 4 reading, HW 4a, HW 4b, and a packet for the lab.

Next we expanded our knowledge of vectors. To subtract a vector A from a vector B, add the opposite of vector B. The opposite of a vector is just the same vector going in the opposite direction. You can also subtract vectors by putting them tail to tail.

http://mathforum.org/~klotz/Vectors/subtraction.html

We also found that to find -(vector A + vector B) you add the two vectors and take the opposite of the resultant.

After our discussion of vectors we started a new lab. Our first task was to find out how many Newtons are in one Spring Unit. After we did that we stretched an uncalibrated spring different amounts, measured the force, and graphed force vs. stretch of the spring (∆x). This lab is to be continued.

At the end of class we turned in the vector lab. Homework is 4a.