A shell is fired from a cannon with velocity \( v \) \( \mathrm{m} / \mathrm{s} \) at an angle \...
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1A shell is fired from a cannon with velocity \( v \) \( \mathrm{m} / \mathrm{s} \) at an angle \( \theta \) with the horizontal direction. At the highest point in its path, it explodes into 2 pieces of equal mass. One of the pieces retraces its path to the cannon. The speed in \( \mathrm{m} / \mathrm{s} \) of the other piece immediately after the explosion is
(A) \( 3 v \cos \theta \)
(B) \( 2 v \cos \theta \)
(C) \( (3 / 2) v \cos \theta \)
(D) \( (\sqrt{3} / 2) v \cos \theta \)
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