The bar of Prob. 5/81 is repeated here. The ends of the 0.4-m bar remain in contact with...

The bar of Prob. 5/81 is repeated here. The ends of the 0.4-m bar remain in contact with their respective support surfaces. End B has a velocity of 0.5 m/s and an acceleration of 0.3 m/s² in the directions shown. Determine the angular acceleration of the bar and the acceleration of end A.