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A body of mass \( 4 \mathrm{~m} \) at rest explodes into three pieces.
\( \mathrm{P} \) Two of the pieces each of mass \( m \) move with a speed \( v \)

W each in mutually perpendicular directions. The total kinetic energy released is:-
(1) \( \frac{1}{2} m v^{2} \)
(2) \( m v^{2} \)
(3) \( \frac{3}{2} m v^{2} \)
(4) \( \frac{5}{2} m v^{2} \)
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