Car A negotiates a curve of 60-m radius at a constant speed of 50 km/h. When A passes...

Car A negotiates a curve of 60-m radius at a constant speed of 50 km/h. When A passes the position shown, car B is 30 m from the intersection and is accelerating south toward the intersection at the rate of 1.5 m/s². Determine the acceleration which A appears to have when observed by an occupant of B at this instant.