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please solve 4. (3p.) A child whirls a stone in a horizontal circle 2.0m above the ground by means of a string 1.5m long. The

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4. (3p.) A child whirls a stone in a horizontal circle 2.0m above the ground by means of a string 1.5m long. The string breaks, and the stone ies off horizontally, striking the ground 12m away. What was the centripetal acceleration and the period of the stone while in circular motion

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