Meriam, Kraige & Bolton — Kinetics of Particles: Problem 3_193

3/193 The 0.4-lb ball and its supporting cord are revolving about the vertical axis on the fixed smooth conical surface with an angular velocity of 4 rad/sec. The ball is held in the position b = 14 in. by the tension T in the cord. If the distance b is reduced to the constant value of 9 in. by increasing the tension T in the cord, compute the new angular velocity \(\omega\) and the work \(U'_{1-2}\) done on the system by T.