Two cars are headed south on the highway at different speeds. Starting when the faster car pulls alongside the slower car, one of the cars accelerates northward for \(5.0 \mathrm{~s}\) and the other accelerates sourhward for \(5.0 \mathrm{~s}\). At the end of that 5. 0 -s interval, the two cars have the same speed. Which car is now ahead?