11. [5 pts] Over a period of 20 seconds, the angular velocity of a wheel changes as in the graph at right. What is the angular displacement of a point on the wheel during the first 10 seconds? -60 rad +60 rad -40 rad -20 rad Zero mooNOwr Angular Velocity (rad's) - = e 2 Lk v =2 v & = = - = Time (s)