Question

A body freely falling from a height h describes 7h/16 in the last second of its fall.the height h is

Answer 1

For h height apply 2nd law of eqn.h = 0.5gt^2and for last second apply7h/16 = 0 + g/2(2t-1)solve both the eqns and get h value.It would come around 80 meter.