In a collision, a 15670 kg bus and a 1230 kg car become entangled and move as a single unit thereafter. Assuming a constant coefficient of kinetic friction (k = 0.45) between the vehicles' tires and the road; a) Determine the post-collision velocity of the combined system's center of mass. (15 pts) b) What is the approximate final position of the center of mass relative to its pre-collision location? (Assume the tires skidding, instead of rolling smoothly on the road.) (15 pts) Initial velocity of the bus p = 5.8 *i [m/s] Initial velocity of the car = 10 * j [m/s] 3