c
(c) When the ball is released from the top of tower then ratio of distances covered by the ball in first, second and third second \({h_I}:{h_{II}}:{h_{III}} = 1:3:5:\) [because \({h_n} \propto (2n - 1)]\)
Ratio of work done \(mg{h_I}:mg{h_{II}}:mg{h_{III}}\) \(= 1:3:5 \)