Find Max Speed Before String Breaks for 6 kg Rock on Rope

[TheronSimon]

Homework Statement

so there's a 6 kg rock spinning in a circle with a string that can with stand a maximum tension of 75 and a radius of 1.5m
and i need to find the maximum speed before the string will break

Homework Equations

Fnet=ma
a=4$\pi$²R/T²

The Attempt at a Solution

so Fnet =ma and a = 4$\pi$²R/T²
so Fg = m*4$\pi$²R/T²
so 6*9.8 = 6*4$\pi$²1.5/T²
so 58.8 = 284.24 / T²
so T = 2.2

no would i be able to use this formula a=4$\pi$²R/T² to find the acceleration and then use a= v²/R to get the speed?

 

[TheronSimon]

anyone?

 

[TheronSimon]

no nothing?