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Force and Laws of Motion — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceForce and Laws of Motion1 Mark
MCQ
The rockets work on the principle of conservation of:
  • A
    Mass.
  • B
    Energy.
  • ✓
    Momentum.
  • D
    Velocity.
✓

Answer

Correct option: C.
Momentum.
The chemicals inside the rocket burn and produce a high$-$velocity blast of hot gases which move out through the tail nozzle of the rocket. As these gases move in downward direction with tremendous speed, the rocket moves up to balance the momentum of gases.

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