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Reynold's Number

A rocket of m...

Question

A rocket of mass 1000 kg exhausts gases at a rate of 4 kg/sec with a velocity 3000 m/s. The thrust developed on the rocket is

12000 N

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120 N

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800 N

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200 N

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Solution

The correct option is A
12000 N

$F = u (\frac{d m}{d t}) = 3000 \times 4 = 12000 N$

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