(a) A yo-yo is swung in a vertical circle in such a way that its total energy...

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(a) A yo-yo is swung in a vertical circle in such a way that its total energy KE + PE is constant. At what point in the circle is its speed a maximum? A minimum? Why? 

(b) If the yo-yo has a speed of 3 m/s at the top of the circle, whose radius is 80 cm, what is its speed at the bottom?

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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