An aircraft executes a horizontal loop of radius 1 km with a steady speed of 900 km h-1.Compare its centripetal acceleration with the acceleration due to gravity.
Radius of the loop, r=1km=1000m Speed of the aircraft,v=900km/h=900×5/18=250m/s Centripetal acceleration, ac=rv2 =1000(250)2=62.5m/s2 Acceleration due to gravity, g=9.8m/s2 Ratio: gac=62.5/9.8=6.38 ac=6.38g
