Block C starts from rest at t = 0 and moves upward with a constant acceleration of 25 mm/s 2 ….

Block C starts from rest at t = 0 and moves upward with a constant acceleration of 25 mm/s2 . Knowing that block A moves downward with a constant velocity of 75 mm/s, determine (a) the time for which the velocity of block B is zero, (b) the corresponding position of block B.