NEET 2014 Physics Conservation of Momentum MCQ Question
A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total kinetic energy generated due to explosion is
mv²
3/2 mv²
2 mv²
4 mv²
Correct Answer
Detailed Explanation
Using conservation of momentum and energy, the third piece must move with speed √2v. The total kinetic energy is then 2mv².
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