If a shell fired from a cannon, explodes in mid air, then
If a shell fired from a cannon, explodes in mid air, then
Its total kinetic energy increases
Its total momentum increases
Its total momentum decreases
None of these
If a shell fired from a cannon, explodes in mid air, then
The chemical energy of the shell is converted to mechanical energy. The external potential energy gets converted to its kinetic energy due to explosion. So kinetic energy increases. But the total momentum remains constant.