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एक राकेट की जेट का वेग 9 किमी./से. है। यदि 300 किग्रा. गैस प्रति सेकण्ड निक्षेपित होती हो तो राकेट पर लगने वाला बल ज्ञात कीजिये।

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दिया गया है:

v = 9 किमी./से. 

v = 9000 मी./से.

dm/dt = 300 किग्रा./से.

राकेट पर लगने वाला बल

F = v x dm/dt

= 9000 × 300

= 27 x 10 न्यूटन

F = 2.7 x 100 न्यूटन

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