Three more mini-podcasts

There are three more mini-podcasts in our iTunes U area, all three about momentum concepts. I created them for the 6th edition of the textbook, but we can use each for our 7th edition, viz.

1. Grade school for momentum, now Exercise 50, p. 113.
2. Woman who jumps on the skateboard, recorded with slightly different masses and initial speed, but same strategy as our Ex. 64, p. 113.
3. Popups, now Exercise 58, p. 113.

I will be trying out a new podcasting method today, so look for an energy-related mini-podcast sometime this afternoon..