Meriam, Kraige & Bolton — Plane Kinematics of Rigid Bodies: Problem 5_133

5/133 Aircraft \(B\) has a constant speed of \(540 \text{ km/h}\) at the bottom of a circular loop of \(400\text{-m}\) radius. Aircraft \(A\) flying horizontally in the plane of the loop passes \(100 \text{ m}\) directly under \(B\) at a constant speed of \(360 \text{ km/h}\). With coordinate axes attached to \(B\) as shown, determine the acceleration which \(A\) appears to have to the pilot of \(B\) for this instant.