The disk rolls without slipping on the horizontal surface as shown . the disk has a clockwise angular velocity of 20 rad/s and a counterclockwise angular acceleration of 5 rad/s^2 at the instant under consideration .the value of r is 200mm and the angle between ab and ob is given as 19.11degree .pin a is fixed to the disk but slides freely within the slotted member bc. determine the velocity and acceleration of pin a relative to the slotted member bc and the angular velocity and angular acceleration of bc. neglect the distance from the center of pin a to the edge of disk.