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

Option: 1

\nu _{B}> \nu _{A}


Option: 2

\nu _{A}= \nu _{B}


Option: 3

\nu _{A}> \nu _{B}


Option: 4

their velocities depend on their masses.


Answers (1)

best_answer

Ball A projected upwards with velocity u falls back to building top with velocity u downwards. It completes its journey to ground under gravity.

\therefore \; v_{A}^{2}=u^{2}+2gh.......(i)

Ball B starts with downwards velocity u and reaches ground after travelling a vertical distance h

\therefore   v_{B}^{2}=u^{2}+2gh..........(ii)

From (i) and (ii)

v_{A}=v_{B}

Posted by

himanshu.meshram

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