The vertical section of a road over a canal bridge the direction of its length is in the form of circle of radius 8.9 m. Then the greatest speed at which the car can cross this bridge without losing contact with the road at its highest point, the centre of gravity of the car being at a height h=1.1 m. from the ground (Take g=10 m/sec2 )
(1) 5 m/sec
(2) 10 m/sec
(3) 15 m/sec
(4) 20 m/sec