Slides 65 - 67 the Acceleration lines on the figure are misaligned, at least on the PDF version.

Thanks for letting us know. I just corrected those slides as well as the others that were missing the arrow heads on some of the lines. Our PDF converter does not correctly convert lines that have arrow heads on them.

Algebra-Based Physics: UCM presentation: Horizontal UCM section; Example #1 and #2 appear to be related in that for #2 we are asked to calculate the new velocity when "new tires" with increased coefficients of static friction are used. The issue, I believe, is that both examples should use the same radius so that a fair comparison can be made changing only the property of the tires. In example #1 the radius=175m and in example#2 the radius was changed to 150m.

Nicholas - you're absolutely correct. The physics of course is right, but we're not backing up our point about the velocity can be larger with friction. I will change Example Problem 2 to 175 m.  Thanks very much for the recommendation. John

I believe that slides 113 and 114, showing the acceleration going downward is incorrect, or am I missing something?

Deborah, thanks very much - and of course, you're right. The video shows the right directions, but somehow the presentation switched the arrows.  I fixed it.  Thanks, John