In the figure here, a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 225 m. If the red car has a constant velocity of 28.0 km/h, the cars pass each other at x = 43.2 m. On the other hand, if the red car has a constant velocity of 56.0 km/h, they pass each other at x = 76.0 m. What are (a)the initial velocity (in km/h) and (b) the (constant) acceleration (in m/s2) of the green car? Include the signs.

In the figure here, a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 225 m. If the red car has a constant velocity of 28.0 km/h, the cars pass each other at x = 43.2 m. On the other hand, if the red car has a constant velocity of 56.0 km/h, they pass each other at x = 76.0 m. What are (a)the initial velocity (in km/h) and (b) the (constant) acceleration (in m/s2) of the green car? Include the signs.