prob_007 - 7. REASONING The centripetal acceleration is...

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7. REASONING The centripetal acceleration is given by Equation 5.2 as a c = v 2 / r . The value of the radius r is given, so to determine a c we need information about the speed v . But the speed is related to the period T by v = (2 π r )/ T , according to Equation 5.1. We can substitute this expression for the speed into Equation 5.2 and see that a v r rT r r T c == = 2 2 2 2 2 4 / b g SOLUTION To use the expression obtained in the reasoning, we need a value for
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