Radius of the loop, \\\\(r = 1 km = 1000 m\\\\)Speed of the aircraft,\\\\( v = 900 km/h = 900 \ imes 5 / 18 = 250 m/s\\\\)Centripetal acceleration, \\\\(a_c = \\dfrac {v^2 }{ r} \\\\) \\\\(= \\dfrac{(250)^2}{ 1000} = 62.5 m/s^2\\\\)Acceleration due to gravity, \\\\(g = 9.8 m/s^2\\\\)Ratio: \\\\(\\dfrac{a_c}{ g} = 62.5 / 9.8 = 6.38\\\\) \\\\(a_c = 6.38 g\\\\)