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Motion In A Plane

Question
CBSEENPH11018566

Why one has to aim a little above the target?


Solution
If a person aims at the target, the particles will follow a parabolic trajectory and will noy hit the target. Parabolic path is followed as result of gravity. 
Therefore to hit the target one has to aim a little above as shown in figure (ii), so that after following the parabolic path, the bullet may hit the target.