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Glad I could help out!
In problem 25 of the presentation on Rotational Kinematics the radius used is the diameter of the wheel. Could you explain why.
Ann Marie - it's an error! To keep the answers the same, I'm just going to change diameter to radius in the question. A new presentation will be done in a couple of days - I have to re record the slides. Thank you for spotting this, John.
I realized my error. No need to answer.