Surprises in the Math of Bouncing and Rolling

New channel WashU Physics: title sample judged 'whole' (Nearly all uploads are substantive physics colloquium talks and lectures covering real research and teaching content, wi); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.