1. The problem statement, all variables and given/known data In a zero gravity experiment a spring has a rest length of 1.0 metre. It is attached at each end to 1.0 kg masses. The combination is then set rotating about its centre of mass at 1.0 revolution per second. Each mass undergoes uniform circular motion with a radius of 70 cm. Neglecting the mass of the spring and assuming Hooke’s Law, the spring constant must be approximately: 3. The attempt at a solution Fc = FH (1kg)(2pi(f))/(1m) = k(1m) I tried equating them and solving for k but it's wrong.