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| Q. |
Which conservation principle is applicable in the case of the motion of a rocket? |
| A. | Conservation of mass |
| B. | Conservation of charge |
| C. | Conservation of momentum |
| D. | Conservation of energy |
| Answer» C. Conservation of momentum | |
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Explanation: The motion of a rocket is an application of Newton's third law of motion and law of conservation of linear momentum. 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. |
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