12-12

Bryan Cramer Friday December 12 2008 Period 4 Todays objectives: Daily Question, Review Homework, Components We started off the class with a daily question and then we reviewed the problems from the homework about subtracting vectors. Subtracting vectors is like when you add vectors but instead of connecting the lines you draw the lines from the same point. You call this the tail to tail method. After that you measure the line and you find both directions it is pointing at. One is for A-B and the other B-A. To prove that you measured correctly is that the angles should be 180 degrees apart. Today in class we learned about vectors and components. This is when you only know the direction and length of the line. Then you are given different directions and you must find how long the lines are in that direction. To do this you first make your line in the given direction and length, then you make a line in the other directions the problem gives you. Next you find the point on the line where it as long as the original line. This gives you the distance the line is going in a certain direction. An example of this on the homework is when superman flies you can find the components of how high and how far he flew. On Monday there will be a quiz for vectors. You will need to know how to measure vectors, how to add vectors, how to subtract vectors, and how to measure components of vectors.