From a building two balls A and B are thrown such that A is thrown upwards A and B downwards (both vertically). If v A and v B are their respective velocities on reaching the ground, then

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From a building two balls A and B are thrown such that A is thrown upwards A and B downwards (both vertically). If v A ​ and v B ​ are their respective velocities on reaching the ground, then

TestHub · Accepted Answer

As the ball moves down from height ' h ' to ground the P.E at height ' h ' is converted to K.E. at the ground (Applying Law of conservation of Energy) Hence, 2 1 ​ m A ​ v A 2 ​ = m A ​ g h A ​ or v A ​ = 2 g h A ​ ​ ; Similarly, v B ​ = 2 g h ​ or v A ​ = v B ​

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