The bar rotates in the horizontal plane about a smooth pin at the origin. The 2 kg sleeve A slides on the smooth bar and the mass of the bar is negligible in comparison to the mass of the sleeve. The spring constant is k=40 N/m and the spring is unstretched when r=0. At t=0 the radial position of the sleeve is r=0.2m, its radial velocity vr=0 and the angular velocity of the bar is ω0=6 rad/s. What are the angular velocity of the bar and the radial velocity of the sleeve when r=0.25m.