1. The problem statement, all variables and given/known data A figure is attached. The symmetric system consists of 4 massless rodes with length 'L',the purple thing is a spring(the spring constant is k),when the system is at rest theta=45 deg. the system starts to rotate with angular speed 'w',the rodes are pushing on the spring and theta is getting smaller. I need to express theta using:L,m,k,w. 3. The attempt at a solution the length of the spring when the system is at rest is: sqrt(2)*L so the force is: k(2*sin(theta)*L - sqrt(2)*L) = 'F' I tried to apply newton's second law: F = ma = m*w^2*R = 2m*w^2*Lcos(theta) where Lcos(theta) is the radius. but the answer is wrong..