An aircraft executes a horizontal loop at a speed of `720 "kmh"^(-1)` with its wings banked at `15^(@)`. What is the radius of the loop ?

Explanation

If N is the normal force on the wings,
`N cos theta = mg, N sin theta = (mv^2)/( R)`
which give `R = (v^2)/(g tan theta) = (200 xx 200)/(10 xx tan 15^@) = 15 km`