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A 15 g stone is tied to the end of a string and moves in a horizontal, circular path. The radius of the circle is 1.0 m. The stone makes 35 complete revolutions in 20 s. What is the tension in the string?
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Then tension gives the stone the required centripetal force What is the expression for centripetal force?
\[F_C=\frac{ mv^2 }{ r }\]
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