First slide
Vertical projection from ground
Question

A ball is thrown vertically upwards with some speed. It reaches two points A and B one after another such that heights of A and B are one fourth and three-fourth of the maximum height attained. If the total time of flight is T, the maximum time taken by the ball to travel from A to B, is :

Moderate
Solution

T=22hg2hg=T2

Maximum time between A to B is = tAO + tOB
=2h4g+23h4g=T212+32=T(3+1)4

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