# Mathematical and Computational Methods in Physics and Engineering (fall 2016)

## Daily outline for Fri, Nov 4, 2016 9:10 AM (1 year ago)

assigned today:

Due today:
• standard-dot and cross:

I can manipulate vectors and their products.

1. 9.1.38 (any 2)
2. 9.2.35 (perpendicular diagonals of parallelogram
3. Prove that the velocity of a point on a spinning solid object is given by $$\vec{\omega}\times\vec{r}$$.

# in class

• Quiz on rotating rigid body
• asked them to consider the contours of $$f(x,y)=x^2+2y^2$$
• most figured either horizontal or vertical ellipses
• talked about being an ant on that surface, choosing a random location and random direction to walk and finding slope of that step (rise over run)
• we all added our points to a big board