A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in T/3 seconds 

(1) h/9 meters from the ground

(2) 7h/9 meters from the ground

(3) 8h/9 meters from the ground

(4) 17h/18 meters from the ground

Concept Videos :-

#13-Graphical-Meaning-of-Instantaneous
#14-Solved-Examples-7
#12-Instantaneous-Velocity

Concept Questions :-

Instantaneous speed and instantaneous velocity

(3)   h=ut+12gt2h=12gT2

After T3 seconds, the position of ball,

h'=0+12g(T3)2=12×g9×T2

h'=12×g9×T2=h9m from top

∴ Position of ball from ground =hh9=8h9m.

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