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Homework Statement
A boy ties a 3.00kg rock to a 0.70 m string and begins spinning it around in a horizontal circle at a constant speed. If the string will break if the tension is greater than 80.0 N, what is the minimum period for the rock to spinning in a circle. How do i solve this?
Homework Equations
m4∏^(2 ) r/T^2
The Attempt at a Solution
80.0= (3.00)4∏^(2)(0.70)/T^2
T= 1.02