Slide 77 has a typo.
The problem states 2.3 m/s
The solution uses 2.5 m/s

Also, the arrowheads are missing on the pdf. 
This is getting much better on the other pdf's I have downloaded this year, so thank you for that!

Thanks for the feedback. The slide has been changed. I also found a few more arrowheads to be corrected.

For the block and the loop problem, to calculate Fn at the top we have to use the v loop, but there is a typo and the velocity in the equation is the v bottom of the loop.

Amany, thanks for your comment. We were trying to point out the similarity of the equation between  v loop and v bottom by showing they both use a square root and a height. But, the height is different between v loop and v bottom, and hence, a different velocity.

So, we show v bottom, but then talk about replacing h by h minus 2 r loop.

I hope that makes it a little clearer.  John

I believe Amany was referencing slide 194 when we are calculating the normal force.  It looks as though the equation was copied from the previous part d, but the value not updated to 3.96 m/s.

Brenda, thanks for the clarification, and you and Amany are right.  Amany, sorry I misunderstood your question. I just replaced the v bottom with v top and changed the answer. I've updated the presentation, and will re record that slide shortly.  John

The units on slide 150 are m/s^2. The units should be m/s. 
Thanks,
Nick Hudson

Nick,

I wonder if you're using an old saved version - the most current one looks like it has the right unit.  Please let me know.

John