Question: A 4 - kg object moves clockwise around a vertical, circular path of radius of 6 . 4 m . At a certain location, the

A 4-kg object moves clockwise around a vertical, circular path of radius of 6.4 m. At a certain location, the object's speed is 3.9 m/s. When it next returns to the same location, its speed is 1.9 m/s.
How much work was done on the object as it moved once around the circle?

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