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5.work,energy,power and collision — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics5.work,energy,power and collision1 Mark
MCQ
If a shell fired from a cannon, explodes in mid air, then
  • ✓
    Its total kinetic energy increases
  • B
    Its total momentum increases
  • C
    Its total momentum decreases
  • D
    None of these
✓

Answer

Correct option: A.
Its total kinetic energy increases
a
(a) 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.

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