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Question

The propulsion of a rocket is based on the principle of conservation of

A
linear momentum
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B
Rate of flow of gases
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C
angular momentum
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D
mass
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Solution

The correct option is B linear momentum
Taking rocket + fuel as system total linear momentum must be conserved since there is no external force. As the exhaust moves out with high speed towards the Earth , the rocket moves with same momentum away from the earth as the net momentum should be zero .

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