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A small rock with mass 0.20 kg is released from rest at point A, which is at the top edge of a large, hemispherical bowl with radius R = 0.50 m. Assume the size of the rock is small compared to R, and assume the rock slides rather than rolling. The work done by friction on the rock when it moves from point A to point B at the bottom of the bowl is -0.22 J. What is the speed of the rock when it reached point B?

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