A 4.00kg object is moving towards the right at 1.80 m/s. A 6.00kg object moves to the left at 0.20 m/s. After the two objects collide, the 6.00-kg object moves toward the right at 1.40 m/s. What is the final velocity of the 4.00-kg object? Assume no external forces act on the objects. Question 2 A 110kg tackler moving at 2.5 m/s meets headon (and holds on to) an 82-kg halfback moving at 5.0 m/s. What will be their mutual speed immediately after the collision