Published on: Wed Feb 10 2010

This lecture used many pretty Graph’s it may be difficult to recreate. Ok. So this will have to do. We talked about- Magnitude (Specified by r)
- Direction (Specified by θ)
- x and y are the components of the vector (and z if 3-D)
- → on top of r means r is a vector
- |r| (with arrow on top →) means magnitude of vector r. It is always positive
- In polar coordinates, r is a radius.
**Scalar**Show Magnitude without direction. (Time, Mass, Temperature)

- 1) Direct along +x axis, read this “I hat”
- 2) Direct along +y axis, read this “J hat”
- 3) Direct along +z axis, read this “Z hat”