IB Physics - Topic C.5 - The Doppler Effect

In this video, Mr. Van Loh proudly presents some of the worst stick figures ever shown in an IB Physics lecture on the Doppler Effect. The poor monetization continues unabated!

Bonus points for viewers who locate the shameful typo.

Note: this was formerly Topic 9.5 in the old IB Physics syllabus.

[hqppyfeet]

10:30
This confusion would have easily been avoided if we wrote v+u_o for Observer instead of u_s. It doesn't make sense for it to be u_s.