Question

a body fall freely from the top of a tower and during the last second of it's flight,it falls 16/25th of the whole distance.find height of the tower.​

Answer 1

Explanation:

The body falls through

h−(7h/16)=9h/16 during (n−1) seconds and fall through 'h' in n seconds

using s=ut+1/2at2

9h/16=5(n−1)^2

and h=5n^2

dividing 9/16=(n−1)^2/n^2

we get n=4

Therefore h=5×42=80m