Question

Stone dropped from top of tower is found to travel 5by 9 of the height of tower during last second of its fall The time of fall is

Answer 1

For complete journey

H = 0.5gT^2

For first 4H/9 journey

4H/9 = 0.5g(T - 1)^2

Divide above two equations

9/4 = [T / (T - 1)]^2

3/2 = T / (T - 1)

2T = 3T - 3

T = 3 seconds

Time of fall is 3 seconds

HOPE IT HELPS YOU....