[单选题]
A jet plane flying 600 m/s experiences an accelera , tlte03,no 9n;kiwwrtion of 4g when pulling out of w tner;,tk lwn9i0,3o4c*ofbco0ltir 3o1 o3(wnb2a the dive. What is the radius of curvature of the loop in which the plane is flyingi3ob4 20fno tlb(cawo*c3 1 ro?
