A 0.2kg mass is tied on the end of a 1.6m long string and whirled around a circle that describes a vertical plane.
a) What is the minimum frequency of rotation needed to keep the mass moving in a circle?
b) Calculate the maximum tension in the string at this frequency.
f=frequency which is unknown
The Attempt at a Solution
Im stuck on the fact that i only have two givens and i don't seem to be able to use two equations as it solves one variable, but introduces a new one.
(top) Fc-mg<------(0.2kg)-------> mg+Fc (bottom)
Part b) is easy to solve once a) is done as i know the highest tension on the string will be at the bottom of the loop where the tension equals mg+ the centripetal force
It would be appreciated if somebody could guide me in the right direction for part A