11.
Two vehicles A and B are traveling west and south, respectively, toward
the same intersection where they collide and lock together. Before the collision, A (weight 2720 lb) is moving with a speed of 38.5 mi/h and B (weight 3640 lb) has a speed of 58.0 mi/h. Find the magnitude and direction of the velocity of the (interlocked) vehicles immediately after the collision.