Question

Class IX children were given an activity to find the height of sch
a ball from the top of the building. Vivek found that the ball re
earth in 3 seconds.
Considering the average value of acceleration due to gravity as
following questions.
(i) What will be the initial velocity of the stone?
(ii) What will be the velocity of the stone just before it reaches
(iii) Find the height of school building.
(iv) If another stone projected vertically upward to reach as m
building. In how much time it can reach this height?
(v) Srikanth projected a ball vertical upwards with a velocity 4
maximum height attained by the hall​

Answer 1

iii. no. ka. answer. 3.4