Medium
$A$ free body of mass $8 \, kg$ is travelling at $2 \, m/s$ in a straight line. At a certain instant,the body splits into two equal parts due to an internal explosion which releases $16 \, J$ of energy. Neither part leaves the original line of motion. Finally:
- ABoth parts continue to move in the same direction as that of the original body.
- BOne part comes to rest and the other moves in the same direction as that of the original body.
- COne part comes to rest and the other moves in the direction opposite to that of the original body.
- DOne part moves in the same direction and the other in the direction opposite to that of the original body.
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$(c)$ $A$ particle moves in a circular path of radius $a$ under the influence of an attractive force with potential energy $U = -\frac{k}{2r^2}$. Its total energy is = .......
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