A rectangular rigid body is suspended with links O1A and O2B. O1A and O2B are parallel and have the same length of l = 2 m. The motion of the link O1A is phi = pi t. There is a point M on the rectangular rigid body. When t = 0.25 s, find: 1) velocity of point M; 2) acceleration of point M; and 3) normal and tangential accelerations of point M.
