B/251 Two steel balls of the same diameter are connected by a rigid bar of negligible mass as shown and are dropped in the horizontal position from a height of150

mm above the heavy steel and brass base plates.If the coefficient of restitution between the ball and the steel base is 0.6 and that between the other ball and the brass base is 0.4, determine the angular velocity w of the bar immediately after impact. Assume that the two impacts are simultaneous.