David+Vasisko+12-4

Objectives: Test Review Daily Question Using Vectors

Handouts received: Pages 10, 11, 12, 13 Note: no reading guide was given for this chapter.

Daily Question involved setting up lists of Vectors and Scalars. Vectors show direction and magnitude on things like Velocity and displacement. While scalars show only magnitude on things like mass and distance. The following list was composed in class.

[|vectorlist.JPG]

Note that two vectors are the same only if the magnitude **AND** directions are the same. Example: A velocity of 30 m/s heading north is only equal to another velocity of 30m/s heading north. Not a velocity of 30m/s heading south.

From this point forward and vector will now have an arrow placed over it like →. The arrow should always be a line with a triangle attached to it not an unconnected > at the end of a line. The length of the line corresponds with the relative strength compared to the other forces in the problem. While the tip of the arrow points in the direct of that quantity.

Now to determine directionality we use angular measurements (this is the protractor part). Directly East - 0° or 360° (depending on how you read it) Directly North - 90° Directly West - 180° Directly South - 270° To read a protractor correctly you must place the tail of the vector in the half-circle exactly where 90° hits the 180° perpendicularly. Also always use the inner numbers to figure out the angle of the vector and not the outer part of it.