When a stone is thrown up, it reach it reaches a certain height and then stars falling down. Why ?

From the top of a tower, a stone is thrown up and it reaches the ground in time t_1 A second stone is thrown down with the same speed and it reaches the ground in time t_2 A third stone is released from rest and it reaches the ground in time The correct relation between t_1,t_2 and t_3 is :

From the top of a tower, a stone is thrown up and it reaches the ground in time t_1 A second stone is thrown down with the same speed and it reaches the ground in time t_2 A third stone is released from rest and it reaches the ground in time The correct relation between t_1,t_2 and t_3 is :

When a ball is thrown up, it reaches a maximum height (h) travelling (5 m) in the last second. Find the velocity with which the ball should be thrown up.

From the top of a tower, a stone is thrown up. It reaches the ground in 5 sec. A second stone is thrown down with the same speed and reaches the ground in 1 sec. A third stone is released from rest and reaches the ground in

From the top of a tower a stone is thrown up which reaches the ground in a time t_(1) . A second stone thrown down with same speed reaches the ground in a time t_(2) . A third stone released from rest from the same location reaches the gound in a time t_(3) . then

A ball is thrown up with a certain velocity so that it reaches a height 'h'. Find the ratio of the two different times of the ball reaching (h)/(3) in both the directions.