At the instant shown the angular velocity of the 6kg bar is 10rad/sec counterclockwise and its angular acceleration is 3rad/sec clockwise. Determine a) the velocity of the center of the bar at this instant, b) the acceleration of the center of the bar at this instant, c) the kinetic energy of the bar at this instant, and d) the angular momentum of the bar at this instant about an axis through the center of the bar.