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Q. |
The working of a rocket is based on the principle of: |
A. | Conservation of momentum |
B. | Conservation of mass |
C. | Conservation of energy |
D. | Conservation of angular momentum |
Answer» A. Conservation of momentum | |
Explanation: The operation of a rocket illustrates the conservation of momentum. Just before launching, the momentum of the rocket is zero. When the rocket is fired, it forces a jet of hot gases with a high velocity through the nozzle. The jet of gases acquires a momentum downwards. Hence, the rocket acquires a momentum of equal magnitude in opposite direction. Thus the rocket moves upwards. |
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