AP EAPCET 3 Sep 2021 Shift 1 Paper

A student whirls a stone in a horizontal circle of radius 5m at height of 5m above ground. The string breaks and the stone flies off horizontally. The stone covers a horizontal distance of 20m. The magnitude of centrifugal acceleration of the stone when it breaks off is ______ (g=10m⋅s−2)