The robot arm makes an angle of 40 with the rotating shaft. which oscillates about the y' axis with the relation e(t)= /2 cos (2.t) rad, as shown in Figure. The shaft has angular velocity of w= 0.5 rad/s. At the tip of the arm, there is another shaft. A disk is spinning counterclockwise with w= 7 rad/s about this shaft. Find the angular velocity of and the angular acceleration the disk at = 3s. 40 B