Physics Question 43 – NEET-UG 2023

A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity $4{\text{ m s}}^{-1}$. The ball strikes the water surface after $4\text{ s}$. The height of bridge above water surface is (Take $g=10{\text{ m s}}^{-2}$) :