Determine the centripetal force acting on the ball and b if, Ask an Expert

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A child is twirling a 0.0120-kg ball on a string in a horizontal circle whose radius is 0.100 meters. The ball travels once around the circle in 0.500 seconds. (a) Determine the centripetal force acting on the ball, and (b) If the speed is doubled does the centripetal force double? If not, by what factor does the centripetal force increase?

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