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.
Found an issue with this question?
Related Questions
More from Mechanics
A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while tu...
A bullet from a gun is fired on a rectangular wooden block with velocity u. When bullet travels 24 cm through the block along its length horizontally,...
The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm, potential energy stored in it will be: