here is the problem: --- Two identical blocks are tied together with a string and placed along the same radius of a turntable that is spinning about its center. The inner block is 1 cm from the center and the outer block is 6 cm from the center. The coefficient of static friction between the turntable and the blocks is µs = 0.75, and the string is taut. What is the maximum angular frequency such that neither block slides? --- the sum of all forces on each block = mass * centripetal acceleration. f1/f2 = friction on the outer/inner blocks, respectively m1/m2 = mass of the outer/inner blocks, respectively R1/R2 = radius of the outer/inner blocks, respectively T = tension so, f1 + T = m1 * a; f2 + T = m2 * a, which can also be written as... f1 + T = m1 * ω^2 * R1; f2 + T = m2 * ω^2 * R2 solving for ω^2, i got... ω^2 = (F1 + T)/(m1 * R1); ω^2 = (F2 + T)/(m2 * R2). that's how far i've gone, and i'm pretty sure i've gone the wrong direction. will anyone please direct me to a right approach? thanks.